I agree Whitigir, a hybrid amp and indeed a hybrid system can work so well.
For example, I used to be all SS in my speaker system, with big MF 370 power amps for my Kef 107 speakers. It was nice, but until I got a tube pre-amp it was not quite right for my tastes. Fast forward, I now have no pre-amp as gone passive, but do use a tubed DAC feeding my SS power amp and horn speakers, or my Carbon and 009s. So I am still on hybrid territory, there is something in it IMO. In speaker systems having all tube power amps can be expensive to get right, as in most speakers nowadays are very inefficient and can have wild impedance curves. And getting fast and earth shattering sub bass seems a strength of big SS amps I have found, though not in all cases. Usually as budgets go higher, tubes power amps can do some amazing things with sub bass control as well as everything else. But the speaker has to be matched to get the most out of what is on offer IMO.
In HPs we don't really have such huge demands for sub bass / raw power. And tubes do something special especially with timbre and vocals for example.