(lived in Russia until 2021, not authorative source of info)

All ISP providers are required to have black boxes installed on-site. These boxes can do traffic shaping (e.g. Twitter is degraded) and basic filtering based on IP addresses. I think, deep packet inspection is also feasible.

Config updates are pushed centrally to these boxes.

Self-managed VPNs still work.

What about Tor?

Or if Twitter gets more IP addresses, they'll work for a short while, until black box config updated?

Tor provides degraded access without government intervention.

Tor is for nerds, they don't count. You can't expect regular people to run Tor on their phones.

If I ask if there's any place to buy rollerblades nearby, do you think that means I expect everyone to go by rollerblades?

These ISP blackboxes central command should be a prime target now.