I'm sure I'd be preaching to the choir if I told you that it's time for us to immigrate from übercorp owned social media and services. All of you have done so, so that's not the point of this post. Even though we are on these new platforms, the fediverse is still sensitive to requests from governmental bodies and organizations. Lemmy.zip has already blocked UK users and Lemmy.world will almost certainly do the same. Due to the size of Matrix's biggest homeserver matrix.org, the admins of said homeserver are beginning to follow the OSA and have already raised their minimum age to 18+. And instances who don't follow the Act could be subjected to insurmountable paperwork and even blocked from the UK, Australia and other countries enacting these outrageous laws soon.
Blocking UK users to avoid this is almost a necessity, and as Labour is attempting to get lawmakers to outlaw VPNs, we could be seeing the equivalent of the UK Great Firewall soon. However, it will take significant amounts of time, money and paperwork to outlaw VPNs and to get ISPs to block sites and protocols. This is where federated and open source platforms have an advantage, without being shackled by bureaucracy they are able to quickly adapt. But this is not sustainable, and eventually the UK will become even more overreaching in order to gain more control over people's Internet usage.
Darknets such as Tor, I2P and Yggdrasil are a potential solution, however they have multiple issues. Tor is slow and has a reputation of being used by pedophiles and drug traffickers. I2P is scattered in implementation and cannot handle high load. ~~Yggdrasil is alpha software and requires IPv6, which in many countries is simply not possible to use~~. Whilst these darknets are extremely resistant to censorship from other countries, with the only way to fully dismantle them would be to shutoff all access to the Internet, they still are not capable of handling modern Internet usage.
We might need new completely independent mediums seperate from the Internet to avoid this. Physical bluetooth mesh networks or other technology is an example. Maybe even a new version of dial-up. All I know is that governments will not stop here. I might seem like I'm overreacting here, but we need to be prepared for what is coming.
CORRECTION: I was told by a peer that Yggdrasil peers must have IPv6, however one does not need an IPv6 enabled network to use it, they just need an IPv6 operating system/device, which virtually every modern operating system including Windows and Linux does. Yggdrasil is actually Beta software.
