Imo new generations grow up with it and replace the old

I think this is something that never happens. Because it is a multilevel problem about education and conciousness.

I think many people will even with a Bitcoinlstandard need a central institution to handle it. But I think it is still a big revolution to print money. Since institutions could publizise their wallet so anyone can make sure their money is stored.

With the technical limitations of Bitcoin, how mainstream can Bitcoin get without running into the design limits of the protocol?

"the proof is in the pudding"

We are watching already the push back, the regulations, the prosecution of hard core libertarians like the developers of Samurai Wallet, we watched how Phoenix Wallet & Wallet of Satoshi left the USA market hoping to avoid the same ending, Wasabi closed their mixer, and so on...

at this pace, doesn't take a genius to forecast the pressure will increase for regulation and its use only using KYCd services regulated and all and each of the mined sats so far accounted for and authorized for spending...

At this moment, impossible to enforce worldwide, but few totalitarian countries; specially the ones that sell themselves as democracies; are moving quite fast to a 100% control of BTC spending, the ETF was step three (done), step two was infiltration of mining corps (done), step one was control and regulation and removal of exchanges that can't be controlled 100% (done),

Next steps? Probably infiltration of core devs (stay tune for some of them proposing some very controversial BIPs...), getting VISA, Master Card and Amex to integrate themselves with the Bitcoin Blockchain to serve as a firewall for non KYC payments...

All while they keep amazing and buying it, for it is the best investment out there.

How we fight back?, l think hard core libertarians are part of the problem, it is a two tier fight, one side is legal/political, the other is development satoshi style, removing your ego from the scene, most developers are quite fond of recognition and therefore is a hard task.

It doesn't. Monero does instead. Sorry.

You are looking for Monero.