The Geezer album Black Science had a lot of keyboards and it did not work.
For me the most difficult thing is that I am learning melodies on guitar from some songs whose melodies were not meant to be played on guitar. Ever. They were intended mostly for keyboards or melodic percussion.
I've always been into guitars... we want to put keyboards on but keyboard players don't look cool onstage they just keep their heads down. There has never been a cool keyboard player apart from Elton John.
I mean when you get down to very low numbers of nuclear weapons and you contemplate going to zero how do you deal with the reality of that technology being available to almost any country that seeks to pursue it? And what conditions do you put in place?