One day they will start blocking all traffic from outside which is not "registered" with the. We are close to that happening actually with people accepting Chinese app ban
Not really. https://getintra.org/ and its forks work just fine in bypassing SNI based censorship in India and do not require a VPN.
Disclaimer: I work on one such fork.
I just see encrypted DNS on the website. Is there more information somewhere else on how it avoids SNI blocks?