My 92 RS is definitely well behaved. It is the same as a 1976 RS but with the improved monoshock swing arm and the last airhead forks. I massaged the forks and installed a nice shock in the rear. She handles well now but has limits plainly. It's still old tech stuff really.
But I myself don't handle all that well either and have left the peg scraping behind.
And the RS is MUCH better behaved at 90 then the ST. Longer legs or geometry or fairing or whatever. But again it has limits and 90 is plenty fast to go on the old girl.
The ST has MUCH quicker steering and much better suspension but that doesn't mean the old RS can't get around. It's a fun bike to ride for sure. But she WILL shake her head and spit you right off if everything is not up to snuff! Part of her "charm"
For the record though, the ST is far more capable. Road trips it's the ST all the way. No contest.