....the Feds should never have to worry about any threats again. Off the top of my head. How to break Warp 10 Amazing anti-Borg tech Whatever they designed to counter Species 3472 Knowledge of fluidic space A portable holo-emitter 7's Borg knowledge All kinds of transwarp and the like knowledge Omega particle knowledge MORE proof that the Feds need to stop leaving their tech on at night lest it become sentient. What else?
Nope, that kind of tech tech just gets shelved next to miracle techs already achieved in other series, such as the transporter tech to rejuvenate people using a single cell of their body (granting them effective immortality), time travel technology such as the slingshot maneuver, the incredibly useful cloaking technology of the Pegasus (ok, that one may have been outlawed by the Kithomer accords), the Genesis device, the soliton wave technology that showed tremendous promise even if it got out of hand in the first experiment - even if it eventually wouldn't usable as a transport method, it seems to basically generate ever more energy out of nothing, dr. Ira Graves' method to upload consciousness in a computer or android brain, etc, etc, etc. After all, why would the Federation shoot itself in the foot by becoming too advanced? It's not the destination that matters, but the journey, as ensign Kim would put it.
Voyager came back with a veritable gold mine. Enough to advance Federation technology decades if not more. Even so, a lot of what they did was simply experimentation. Slipstream drives breaking warp 10 transwarp These three transportation/speed related technologies were more or less experiments Voyager conducted, they didn't master these technologies. Of course the data is still useful. Everything you listed and all the data Voyager brought back on the DQ-countless first contacts, nebulae, anomalous phenomena, as well as information on the astropolitical situation in the DQ, and plenty of scientific observations. I think there would be enough material to keep Federation scientists busy for a long long time.
That tech was just one reason I wondered why the Time Cop dudes didn't intervene when Admiral (and Cpt.) Janeway decided to change history in order to save her friends...
Why no need to worry? This tech came from folks. Those are a pretty big threat, especially now that our heroes do have their tech! Interesting as such, but no doubt the UFP is constantly inventing ways to go faster. Little of it is practical at first, as we see: not only does the UFP only gradually improve its ships, its many adversaries are similarly challenged in making significant improvements. No doubt there are a thousand and one uses for this "new and better dilithium" that the heroes found. Harnessing it for the superdrive might take some doing, though, as the heroes never appeared to figure out how to travel at less than full throttle, or how to steer. And it's pretty difficult to see weapons applications for something you can't aim, too. This tech doesn't hold a candle to the Spore Drive. Which the heroes do put to use - after all, it came from the heroes. But the Borg can't be defeated with tech, since they adapt. All it gives them is a way to whup Klingon ass, such as in "Endgame" where a shuttle shrugs off two Klingon battlewagons and a tiny patrol boat then beats them to submission. Basically just a better way to distribute Borg nanoprobes. I don't see that helping much in anything but joint assimilation operations with the Borg... ...Certainly something to be suppressed. Which they never could figure out, beyond the user-accessible settings. But perhaps the experts back home did better, since PIC holograms again appear improved over VOY ones which were better than early TNG ones which supposedly trumped TAS ones which appeared to trump DSC ones. ...And in PIC there is this rich Borg-scavenging industry, no doubt chiefly because of Seven and the access and insight provided by her. It was something of a general plot point that none of that stuff ever worked right, so the heroes didn't get home for dinner. Starfleet had all that knowledge already: "Don't touch the stuff, yes, it has potential, and yes, it can be harnessed at risk, but no, we won't take that risk". The events of the adventure would be unlikely to convince Starfleet otherwise. It's odd that sentient tech would not be old news already - and indeed with the EMH, we never really learn otherwise. But AI isn't exactly forbidden, nor is it exactly proliferating. Might be it's not particularly interested in expanding itself, or is capable of doing that in a way that leaves mere mortal life untouched. The EMH is unlikely to be the first hologram left running against instructions in the manual, considering how interactive holograms were a household tech in Janeway's childhood already. Knowledge of galaxy-spanning communications networks, and how to break them. Added insight into Earth history. A few more datapoints on the Q and how to deal with it. All-new ways to treat sick Vulcans. And the whereabouts of Amelia Earhart, in case anybody is interested. Timo Saloniemi
I wonder if it was all confiscated by Section 31 (and weaponised) like Spock/Scotty's transwarp formula in Star Trek Into Darkness?