It was not the look that Killed ENT. Really we only got DSC because of the Kelvin movies.
I think the look helped. General Hammond of Starfleet, TNG rank pips before TOS, TNG styled shapes on uniform. Akiraprise. Bumpy head Klingons (later explained). Engineering made of car parts. Sexy catsuit TPol. Decon chamber sexy time. (You can sing that one like peanut butter jelly song.) baseball caps. All CGI ships, not respecting canon designs (Romulan flea) Tech too advanced/too similar to stuff post-TOS.
I am not these were my bugbears, they weren’t, (well..not majorly) but they were and are topics of...debate with ENT visuals, that we see again almost note for note with DSC. Once you throw in a ‘not Starfleet enough/they are in the process of becoming Starfleet that we know’ discussion, it’s basically a full house.
And there is no denying that DSC definitely visually resembles a sequel to ENT (because it is one. Natch.) with its blue jumpsuits and body armour.
I think the popularity of Trek on streaming services has more to answer for than the KT. CBS wants a streaming service, in essence a new channel, and whenever that company under whatever name, wants a new channel, Trek is its go-to property. (See Phase 2 and Voyager) given existing services are also similar to a syndication model (they buy in shows and have a lot of money and power) you also end up with Trek as a go-to for that pie, look at TNG.
basically...it was Treks time, the pieces aligned.
Unrelated, but since the whole ‘Starfleet Infantry’ was heavily fuelled by the MACO in Ent, and we see the body-armour visual used again DSC....DSC has shown why ground troops are pointless in Trek. That must be a discussion waiting to happen elsewhere again.
ENT 2.0.
With a hint of Voy, but now we are in MU not the Delta Quadrant. DSC is like a punk cover of Treks greatest hits, which may be what they are going for. That sounds more complimentary than it is.