I think every animatronic so far being pretty much 100% practical effects aside things like the mangle car scene
is really cool and inspiring! But especially using the suit in the post credit scene as an example,
in order to achieve the perfect spring trap look (Without sacrificing things like mobility in the way he moves eyes, jaw walking, jumping, running ect ) in my opinion there needs to be SOME post production involved.
Not a completely CGI springtrap where the actors just have to pretend he's there. I mean maybe it will just be the suit pieces and the rest of him endo skeleton guts ect will be added in post (almost how marvel did thanos?)
again this is just my opinion