The 80’s themselves in general were a difficult time for 70’s classic rock bands that either tried too hard to adapt or didn’t even try enough. Genesis managed to thrive while say Kansas struggled, it was a coin toss
Yeah it’s sad most of the good bands from the 70s either broke up (King Crimson, VDGG) or turned to shit (like Genesis after Steve Hackett left and Kansas starting with Monolith). Even King Crimson, who did come back in the 80s, had to adapt to the new wave sound and we end up getting a trio of pop albums, but at least they were able to retain their classic prog sound, and they never had any big hits so you can’t really say they sold out (Heartbeat and Sleepless are the closest things to Crimson selling out, and even those are better than the music Genesis, Yes, and Rush were all making in the 80s).
Honestly between Genesis and Kansas I prefer the latter just because I had grown up listening to them and they were one of the first bands I really got into. They released several prog rock albums in the mid 70s but since most people only know Carry on Wayward Son and Dust in the Wind, they’re often mistaken for just another AOR band like Journey (a band that was never good to begin with) and I think they’re pretty underrated (apart from the two songs most people know).