Rest in peace, lieutenant Uhura

I followed all Star Treks.

TOS didn't have the first interracial kiss for nothing, so you are right that was always there.

However Discovery really tried to push alot through, it had to have a black character as a lead, a lesbian actor and some non gender kid, and in Strange New Worlds hinting at a lesbian couple, you didn't see that in the 80-90's, but it's probably also just the time we live in.
And Picard i would say was just like TNG and not that political.
What did change was that until the movies and the Enterprise series Star Trek was always kinda soapy (why many soap actors played in Star Trek), now just like the movies, the focus is more on speed and action (especially in Discovery).

A quote from Nichols:"Gene's whole vision was that minorities weren't on set because we were minorities, we were on set because in the future, our diverse world would all be working together as equals. I understand that everyone needs to see role models that can inspire them and talk to them and represent them, but I believe that we need to move to a future that transcends race, gender, or anything else. We're all people.".

you really can't be a Trekkie at all if you never managed to register that radical progressiveness is the DNA of Star Trek. Always was.

Thank you! Every time I read some radical right winger sob in his beer about the good ole Star Trek, I'm laughing my ass off.
Roddenberry was a liberal. He wrote a show in the 1960ies about a utopian future with a black female character, a Russian character (in the middle of the cold war), an Asian character and the first interracial kiss on television... and William Shatner.

Now tell me how the 21st century made Star Trek "political" lol

The new show are bad because they are badly written. Only the season one of Picard was half decent and they screwed the pooch after that.