Citizens making transactions on white markets in El Salvador still fall under a government that permisses their transactions whatever those restrictions/regulations, few or many, may be. A quick search already shows they have sales taxes on transactions "you only have permission to transact with others if you pay us money"

Yea do that I would be interested in the answers as well. Largest community is probably the subreddit or the matrix group, maybe telegram or simplex too: https://www.reddit.com/r/Monero/

I would guess a small percentage are okay with custodial options like ecash (I'm okay with it if not advertised as a solution for scaling - I'm a minority in this I believe)

I would also guess that an even smaller percentage (possibly none) consider "custodial solutions" as a "form of scaling". Like I said I am NOT in this camp - I don't think custodians scale anything aside from IOUs. It is just dodging the central point of Bitcoin. It doesn't carry the core properties of self-custody and/or permissionless transactions, so it isn't Bitcoin, and there is no unilateral exit back to the original asset.

The only thing that falls under a category of scaling available right now that I can think of is sovereign Lightning (running your own node). Maybe Drivechains or ZKrollups if that ever happens in the future? idk