Amazon's Prime Video released the entire run (around a hundred episodes) of Babylon 5 to subscribers not too long ago and I have been watching it ever since, one episode every day or so.
At that rate, the rate of improvement in sets and acting is impressive. The early effects don't hold up as well, in part for technical reasons (they were shot in 4:3 and then enlarged and cropped for the extant 16:9 footage, while the live-action was shot in 16:9 originally; there's a huge mismatch in resolution even before you get to the odd textures of early CGI) but if you overlook that, it's pretty slick by the third season and still improving. Even the effects improve and by the fourth and fifth season, they're at least not jarring.
As one of the first long-form SF series (it could be argued that Men In Space and the film and TV serials were the very first), Babylon 5 showed that it was not only possible to have very long story arcs, but that the genre was well-suited to them.
BUILDING A 1:1 BALUN
3 months ago