It’s not some theoretical topic, it’s the reality for China, Russia, Iran. They do block commonly used VPN protocols, so people now use VPN with obfuscations. Some work, some doesn’t, some stop working as time goes. So when people say “Ha-ha, I’ll just use VPN”, it will help you for some time but the trend is they will make it a problem for you, better start preparing before it happened.
What vpn obfuscations do you use? Because you know they’ll block vpn next.
You can probably block companies offering public VPN services.
But good luck blocking VPN in general.
Anything encrypted is blocked. Boom, done.
Is it stupid? Yes. Never stopped lawmakers.
How do you know if something is encrypted?
https://en.wikipedia.org/wiki/Subliminal_channel https://en.wikipedia.org/wiki/Steganography
Or for more practical implementations: https://blog.frost.kiwi/ssh-over-https-tunneling/ (granted, this one uses normal looking encryption to hide hide maybe unwanted encypted traffic) https://nurdletech.com/linux-notes/ssh/via-http.html
It’s not some theoretical topic, it’s the reality for China, Russia, Iran. They do block commonly used VPN protocols, so people now use VPN with obfuscations. Some work, some doesn’t, some stop working as time goes. So when people say “Ha-ha, I’ll just use VPN”, it will help you for some time but the trend is they will make it a problem for you, better start preparing before it happened.