Plenty of shows like Babylon 5 took 20+ episodes to set the pace for the show. SG1 and TNG did the same. TNG took until season 2 to hits its pace. Agents of Shield was the same,etc. X Files took ages to push the overall story forward - Twin Peeks took time to introduce the world,etc. Lost and BSG also took a lot of time to actually progress the story forward. Lots of these shows when you rewatched them you realise things were foreshadowed in the first season.
Then you had series like Watchmen,where people were complaining within 2 episodes.I mean FFS,so many of the best anime series ended up only explaining what is all happening towards the end.
People have gotten used to having the whole season of a show released at once so you can binge watch it. You used to not only have to wait a week for the next episode,but also had to wait ages in between seasons and season breaks. You needed to watch 20~26 45 minute episodes per season with tons of filler standalone episodes when they ran out of script or budget,plus 15 minutes of adverts. Then at episode 10~13 wait a few months for the next part of the season to come on.
Modern shows move at lightspeed compared to the old ones. A modern 10 episode season with 30 minute episodes would be barely the 1st 7 episodes of a 26 episode season with 45 minute episodes.
So 2 30 minute episodes its literally one normal episode,or half a 2 hour pilot - remember pilots?? Yeah,those were upto 2 hours long. The B5 was really mediocre. I am shocked the series managed to get greenlighted!
The whole point of "people don't have time" - people didn't also have time 15~30 years ago.
Except unlike now,you had to watch it on a TV and wait for it to be released. Netflix started as a DVD rental service!
Nowadays you have tablets and phones,meaning you can watch shows much more easily whenever you want.