Intresting. Immovability becomes a property of the type (!Move) rather than the place (Pin), and the goal is to eventually deprecate Pin outright rather than pa

Intresting. Immovability becomes a property of the type (!Move) rather than the place (Pin), and the goal is to eventually deprecate Pin outright rather than paper over it with pin ergonomics. !Forge is what finally unblocks safe scoped spawn: handle that can't be mem::forgeten has a destructor that's guaranteed to run.