I'm seeing people posting scripts for automated recovery.. Scripts don't work if the machine won't boot (it causes instant BSOD) -- you still need to manually boot the system in safe mode, get through BitLocker recovery (needs per system key), then execute anything.
Crowdstrike are huge, at a global scale that's going to take.. some time.
Crowdstrike statement: https://www.bbc.co.uk/news/live/cnk4jdwp49et?post=asset%3A0c379e1f-48df-493c-a11a-f6b1e3d1eb63#post
Basically 'it's not a security incident... we just bricked a million systems'