My $0.019 is that the amplification chain for bass guitar has been diverging into diverse solutions more than converging to any kind of center; but, there is also a HUGE missed opportunity / hole in the gear offerings.
What do I mean? Well, first you will find all kinds of varying signal chains because many acts have moved in the direction of using the PA as the primary projection system; NOT all, but enough that it affects the general gigging scenes. So, several technologies, including pedal board mounted preamps and in-ear monitors have become part of a prepared bassist’s tool kit.
All of this can converge, but needs some missing pieces.
What are missing are real deal bass cabinets with real deal Class D power sections built into them. What I am referring to are cabs built by the Bergantino / Barefaced / Mesa / GK etc makers which COULD have legit power sections, like the ICEPower 700ASC, installed internally; where the power amp can run at 8 ohms into the built-in enclosure, with a line out into an extension cab to run at higher output. A SIMPLE preamp circuit to allow stand alone combo mode as an option would be a bonus; but, allowing the pedal board preamp input would be perfect.
I recently bought a QSC K10.2 for use as a (mainly vocal) monitor on my current gig. That speaker actually hits a couple of the marks, but is not optimized for bass instrument use. A little too heavy for what it does, etc. Still, it shows the way.
For the moment, I’ve been gigging with my pedal board preamp (also IEM friendly) into a Demeter Minnie 800D sitting on Bergantino cabs. For my last gig, the Minnie was driving a Bergantino HG310. While that is not too far off a combo, it does still have the (separate) power section sitting on top of the cab; which, with neo speakers etc, could be internal.
I just think part of the issue is that bass players are still presenting the cab / amp builders with an incoherent wish list. We need to get it together and stop going in too many different directions.
Probably TL;DR. But, it is an important topic. At this point I’m kind of tired of all the different gear rigs, none of which hit all the buttons. Doesn’t have to be this way.
Edit: For example, something like a Mesa D-800 mounted within a Mesa Subway 112 would be a really great start. A player would have a LOT of options with such a box.