Indeed, but 28-45 isn't that much zoom..
The art line is like the "enterprise edition" of lenses :-)
https://electronics.sony.com/imaging/lenses/full-frame-e-mou...
I like it even better than the much more expensive 135mm G Master I have except the autofocus of the 90mm is too slow to shoot volleyball indoors.
Sometimes I think I'd like to try a lightweight lens and/or a lens with a very wide zoom range, but in the end I can have convenience and come back with photos that aren't so good and a lot of times you get just one chance to take a shot so why take one that's less than it could be?