I'm not saying that his solo work isn't high quality. The same goes for the songs you mentioned. But the fact is that (almost) everything Mark has played on his solo albums are more or less rehashed versions of what he already has done many years before, and those versions are usually watered down, minimalistic, and frankly not that exciting. Especially for younger players looking for hot guitar playing (and for YouTubers wanting views). His Strat tone never really got better than on Communique (at least in my opinion), his soulful distorted playing never got much better than on BIA (the song, the album), he peaked technically when he spent time with Chet Atkins, but we are talking 35 years ago. His playing during the solo years does indeed have value, and there's much to be said for a less-is-more approach, but none of it is really revolutionary. If you want minimalistic, look to JJ Cale or Mike Campbell for example. We are biased because we are fans, but frankly there are tons of guitar players I find a lot more interesting than Mark. Not only technically, but also musically and creatively speaking.