> If they're sandboxed the same as other apps and have fine grained permission controls I'd do a lot more sideloading.
They are subject to the same permission request/granting system as apps installed through a store. That system is OS-level and applies to all non-system apps.
The issue is that once you grant access to terminal.... anything you run in it has access. So it's not very useful since almost everyone will have granted that access within a few minutes of being in the terminal.