Made the switch 45 years ago with a Sony TA-3200F. Still have it, though regulated to multiamp duty on my 'B' setup. Never had a problem, sounds fabulous. In the heyday of HH Scott, Marantz, Mac etc. it was heralded by all my friends as having the best sound they'd ever heard. There is IMO no point to using tubes unless you like the visual factor. Induce some phase shift in the last 1 1/2 octaves, stay out of clipping and poof, you have that 'warm tube sound'.
Switching to solid state amp?
I have had tube amps for the past 20+ years and have totally enjoyed their sound in my system. I am thinking of trying a solid state amp. Pass Labs comes to mind but would be open to anyone who made the switch, was happy and what brand worked for you. Btw I will still be using a tube preamp. Who has been happy with the switch?