Now my granpa had one of those FM radios with tubes in it and a Class A amp to boot, I wish my mom didn't junk it when they were bulldozing his workshop, that would've sounded pretty good on guitar
I hate some of these tube amps as well - the Blue Voodoo and Kranks come to mind. On the other hand I don't think I've heard anything that sounds better than a tube amp on guitar, sims or solid state so you have to be careful how you classify the gear.
If say a kind in his bedroom studio that has a 10 watt Squier amp mics it up and records it in his PC via a $10 Sony dynamic mic it will sound like crap. If on the other hand the kid plugs in direct and uses an amp sim software he might get something halfway decent.
If that kid had only this amp sim to work on the sound he might even be able to get some brilliant results that us tube snobs can't get because we are so used to hearing the response of a real amp in a room. I think the new generation of guitar users, the reason I call them users is because it is such a PC-centric task nowadays, will be able to achieve much better tonal results than say myself, when I have stacked up half a room of tube gear and distortion boxes which I can immediately access for any type of sound I think of.