Took the opportunity during stay-at-home covid time to fix the A and C pillar trim. I used 3M Headliner Adhesive (38808) (link) as well as DAP contact cement (link).
Results are quite acceptable, especially for first time doing the job and reusing the existing fabric.
The car already feels less ghetto and less like an "old car." Next will probably be the exterior rain-gutter moulding rubber gasket (at the Hoffmeister kink) as well as the trim strip underneath the rear windows.
Also, glad to say the fuel pumps aren't leaking anymore.