Hello everyone. So if you found that holding CTR didn't help for when trying to do a midpoint snap, I believe the keys are different. In Blender 4.x it is SHIFT, Not CTRL. There is something similar for when creating a new cut. A new cut is the RMB and not E. It's slightly different. Oh, and angle constraint is A! Thought I should leave this here just in case someone was struggling.
Also, here is my pumpkin!
Yes Samuel, you are right,
they changed the Knife shortcuts in 3.0:
https://developer.blender.org/docs/release_notes/3.0/modeling/
Luckily, you can always see the relevant key presses in the Viewport:
I'd say they are pretty substantial changes. Most of the keys are swapped with each other and others are completely different. So I'd recommend learning the new knife tool shortcuts on your own or somewhere else, but this videos is still useful nonetheless
