It's not needed on everything but I really appreciate the extra options on my recumbent and touring bike.
Tolerances on a 1x setup are also much tighter, not ideal for long distance cycletrekking adventures.
Also, with a front derailer, dropping the chain to a smaller cog in the front to get to a lighter gear results in much happier shifting than having to lift the chain to a larger cog on the rear derailer when going uphill.
When MTB racing you can really get some advantage out of shifting combination discipline using a front derailer, when going from a downhill into an uphill.
I'm sad it's hard to find a 2x setup on new bicycles nowadays :-/
I see the point of it being a potential e-waste in 10 years, but I'm not sure the mechanical route was much better in that respect (looking at you, shimano shifter-derailleur-brake compatibility table that currently runs a few pages long even before adding all the Di2 stuff)
BTW - "what" do You need a 48-spoke hub for? Are You building cargo bikes in Your spare time? I'm not trying to be snarky - the "all our bikes load limit is 120kg bicycle included" has long been bothering me as well (100kg rider), so... kinda curious about Your side projects