I wasn’t talking about the technology behind VPNs. Every single country that “bans VPNs” still uses them commercially to some extent.
What I consider a ban on VPNs is a ban on commercial B2C VPN providers that do not comply with US legislation - meaning they’d allow customers to access banned sites.
Add the fact that pretty much all major payment providers happen to be US companies and I’d wager 99% of “normal” access could be blocked.
Oh, I thought you meant physically unable (for some time) - meaning they’d have to upgrade their router hardware or something which would take a couple of weeks/months.
But yes, right now the US is unable to implement a firewall. Though with the current Supreme Court it might as well decide tomorrow that free speech doesn’t extend to communication via electrons or something.