For practical purposes, the idea of pairing a closed-back 2-12 amp and a 1-12 combo makes some sense, as does putting a closed 2-12 or 1-15 extension cab under a combo.
Either provides more logistical, transport, and toting challenges than a humble combo but ought still to be manageable even for us old guys.
And well worth it for the tonal benefits, even at low-ish volume. (Especially when playing quietly, I find a bit of low-end authority provides some aural satisfaction.)
I've played (very badly) through some crazy rigs. When I think back on it, somehow whatever the era, I played against prevailing trends. In the 70s when clean-toned pop had given way to hard rock crunch, I had ridiculous arrays of crystal-clean stupid-loud gear.
There was the 100-watt Kustom pleated head atop a single-18 reflex cab upholstered in padded black vinyl with shiny tacks in a diamond pattern, paired with a 2-12 Bandmaster cab. The reflex cab must've been 3'x 3'x 5'. Thank God I know of no recordings of it; it had to sound as stupid as it ... sounds. Guy on my floor in the dorm was selling his bass cabinet to get something smaller. It was cheap.
When I scaled down from that mad rig, it was to a 6-10 Acoustic brand (remember them?) cab, I think with an overpowered Sunn head of some description.
And it wasn't a stack, but I did a lot of playing in the late 70s and into the early 80s with a Bandmaster head and cab. I still have the cab, loaded with 12" JBLs from the 60s; wish I still had the head.
Bassist I worked with in that era had an SVT with both cabs, which he insisted we all show up at his house before gigs to help him load; he also had a Super Beatle he'd sometimes take for one of the guitarists to play through.
Later I came into a 2-15 blue metallic pleated Kustom bass cab, which makes a nice companion for the Bandmaster cab when I'm feeling stupid.
But most gigs now are just a 1-12 combo.
Is playing through Too Much Amp like being young again?