More RAM would actually have to integrated at the chip fab.
The RAM in the new Apple silicon-based Macs is NOT part of the fabbed chip, it is on-package & adjacent to the M1 chip...
Only 16 GB RAM means that the MacBook Pro is quite useless for a lot of Pros. Video and Audio (at least when working with virtual instruments) need much more RAM.
You forgot to add: "....when working with Intel machines that gobble up RAM like its nothing, which is of course my only experience since I've never used an Apple Silicon and have no idea how these will stack up."
Was ready to buy, but 16 GB of RAM? Not nearly enough for audio work in Logic. Need 64 GB for plugins.
Oh and you know this because you've used an Apple Silicon Mac with 16 GB of RAM?
I was coming to say the same, but @Deinocheirus nailed it...! ;^p