Wow, this is like a Jaco thread.
I currently own a variety of amps, including a '72 SVT rig. It is heavy. It is cumbersome. At my age (creak, groan) the logistics of moving it around are very real considerations. As a result it has been essentially relegated to duty as the world's largest practice amp. The ground that is my sporadic and smaller gigs has been ceded to a pair of Ampeg B100Rs - not exactly lightweights either, but they do an admirable job of sounding like an Ampeg tube amp, and are eminently more manageable.
But I know better than to get rid of the SVT. Even at bedroom (basement) volume it is a glorious, hallmark tone. It is there if I need it, and I like that security. Some people aren't into it because it doesn't suit their style - and that's okay.
I do not own a Class-D bass amp. The ones I have played have not impressed me. Maybe someday...