In most cases, getting stuck isn't an issue. With JVS a player couldn't click on the door when they got stuck, but you can still click the door when you're stuck in a default door. And that could easily be made as an add-on if people really want it. Restricting IDs, as you can see, is a thing that's already made. Admin only is an awful idea. An admin should just be F8/F7ing into a restricted room. Having a restricted doors just risks having stupid people trying to barrel through it when they shouldn't even be able to. ID Blacklisting seems like a bad idea.
And the point isn't about what JVS has. Any features of note could be easily recreated for default doors.
The point is that JVS is inefficient and people only used them because that's all we had.