"You can go down a rabbit hole just in what is the best class D amp or if/ when is it better than A or A/B as far as what's best just for SS bass."
@yoder Wish I knew the trick for highlighting text copied and pasted . . . anyone?)
I was one of those who suckered on Bob Carver's intro product as his own company: a megawatt Bang For Buck Class D stereo amp, perfect for quick money exploiting the hormonal market of the time. Thought this would power the Maggies I was using back then. Um, no. So much for Class D. Sure, it's better 40 years later, but I'm A-A/B all the way now when it comes to SS power.
As for sonic preference in bass presentation: realism is essential, but so is amplitude, and that sense of dynamic headroom still thrills me. Guess you could call me a bassoholic -- my ancient ears gravitate to the bottom frequencies because they're the only ones I can still hear in a "critical listening" way. That's why Legacy, and you're right, that's why SS for the bass, providing it's 5-10 watts of Class A with A/B beyond.
Given that I'm never spending $30k+ for a Fortress tube amp, we're down to feasible bi-amping. At least I still hear well enough above 400 Hz that the tube glow might be magical and worth implementing if not too fussy.