I've brought this up many times. In 300 years power sources for ships have changed rapidly and continue to change. From oars to sails to engines to electric drive to nuclear to gas turbine.
Every Star Trek ship from the Phoenix to a ship 900 years in the distant future MUST have exactly the same engine configuration: Dilithium, antimatter, deuterium. Every ship has to have warp coils, a warp core and the exact same details.
We know this is not the case. The TOS nacelles have details and features on them that later generations lacked. And we know from dialog that the engines apparently generate the magic IN the nacelles themselves NOT some special "warp core."
TMP and TWOK both show vastly different from TNG style engine setups. Yet we try to make those match TNG rather than say "well they probably did things differently in that era."
It's one of the canon-conceits that I get tired of when discussing technobabble. Let's look at a US Navy example: The drive on the battleship USS New Mexico is nothing like the drive on the Freedom class. Yet we don't have people looking at the Freedom class ships and then pointing to a diagram of the Battleship New Mexico and saying "these boilers are actually gas turbines and these components here that are labeled as condensers are actually emission control units and this part here, the fresh-water evaporator for boiler makeup is actually how they handled the fuel for the gas turbines."
We also do not have people looking at the USS Constitution on display and trying to figure out how those funny masts and sails functioned as gas turbines or nuclear reactors.
900 years in the future-future I would have expected Starfleet to have perfected something other than the same thing we've been discussing since the 1960s.
What's worse is that the production team keeps introducing NEW ship designs in the SAME era all the time, while simultaneously suggesting how modular/adaptive all SF ships are by design and technically even older designs CAN be upgraded to latest standards.
New power sources or FTL propulsion technologies? Forget it.
For UFP, this kind of lack of change is just unrealistic when you factor in the premise that new superpowerful technologies can be invented and used in a span of a single episode and then conveniently forgotten. But alternate viable power sources and methods of FTL are somehow unattainable.
I can buy that M/AM and dilithium could be in use for the first 100-200 years or so... but once the UFP was formed and you suddenly had the resources, technical expertise and scientific prowess of 4 different fully developed space faring species who freely worked together and exchanged knowledge... M/AM and dilithium would have likely gone the way of the dinosaur (much like money did) after the first 50-100 years of UFP's existence (and this is a generous estimate when you take into account that science and technology evolve exponentially for just one species),.
But fine, for the sake of established canon, lets say the UFP did continue to use M/AM and dilithium into the 24th century.
After TNG, DS9 and VOY have run its course, it would be IMPOSSIBLE for UFP to continue justify use of M/AM and dilithium as a power source when alternate technologies have proven to work.
By the time of Star Trek: Picard, the UFP should have switched over to a combination of Tetryon reactors, and whatever power source Arturis ship used... Kriega Waves and integrated aspects of Soliton Wave technology (if nothing else for the sake of improved efficiency).
The computing power each starship has at its disposal is ridiculous to say the least. A few words to the computer and it could have been doing R&D of new sustainable power sources in a tiny time frame.
It takes adaptive algorithms hours to days to come up with solutions to problems humans alone would need decades to find answers for in real life... and UFP is working with far more sophisticated technology to boot, having since expanded to include dozens of species in the 23rd century and finally over 150 species in the 24th century... can you imagine the scientific and technologica developments that would occur over just 5 to 10 years in such an organisation?
It would be literally very difficult to predict (much like it is now) and UFP would have been far more advanced than shown... doesn't mean you cannot tell good stories with that... you can... literature is certainly full of such possibilities... so why is it that Trek writers decided sticking with M/AM and dilithium was somehow convincing or needed?