I don't mind using random orbits when painting. using one to sand between coats I can achieve a very nice nearly piano finish. For sanding wood to be oil or clear finish I always hand sand. Sanding sealer, then sand and another coat followed by ss steel wool are great to prep wood for poly or catalyzed finish.
I don't sand between coats, I scrape with a box cutter blade, ultra slick and levels the sealer, then hit with green or brown scotch brite. Steel wool leaves fine slivers of the metal stuck in the finish. And definitely no poly.
Main rule when sanding wood, start with 80 next 120 - 180 - 220, don't skip a step, for no swirls.