Zappa and the LSO
Not only do they not make ‘em like this anymore ‘they’ never really did:

Thankfully Zappa was never one of ‘them’.
Check out this Newsnight clip from 1983 where Zappa’s music is dismissed as an ‘expensive hobby’ and he gives his opinion on the then newly completed Barbican. Great stuff. Conductor, Kent Nagano, goes on to say:
In some ways this music, I think the fact that we’re documenting it on recording, could be one of the most historical events of this particular century…
YouTube footage via Zappa Internet Jam Sessions.