Greg Lake put on weight and was not happy with his singing. Emerson was trying to get him to do a reunion but Lake was not interested - last I heard. Emerson had his hand operated on too.
They are all outstanding musicians. Lake had a great voice.
I think it was just last year(?) that Emerson and Lake put on a small tour (or maybe just one concert?). Was “unplugged”. The youtube clips of it are pretty bad, so hard to judge the quality of their playing. With Emerson’s hand surgery I’m surprised he can play as well as he does.
I saw them back in 1993 on their “Black Moon” tour. I was leary as I had heard on TV Lake singing with ASIA the year or so before that and he sounded terrible. The concert I went to he was right on - they all sounded great.