I have a shallow knowledge about the topic but I have an experience to share.
I'm not a pro in guitar playing and nothing special with my array of gear since day 1.
SS amps and modeling amps palagi ang nagagamit ko. Not bad! I mean, nabibigay naman niya yung sound na gusto ko. I owned several SS amps narin and I only have 2 of those na lang ngayon
Until one day... (last month) A 100-watt tube amp came home and I played with it! DAMN!!!! Ayoko na itigil! Ang sarap sa tenga and mas lalo ako nagaganahan mag gitara, parang ang galing ko!
In short... Tube amp wins! Hehe .. at least sa experience ko ha