I personally like a line on a paper map as well even when using a GPS route.
This is a very valid point. I am sure the majority of the anti-GPS views (well, ignoring the really daft ones) are based around not carrying any paper plan whatsoever.
There is persistent pilot forum rumour that people actually do that, but I don't know anybody (with a brain, and a PPL) who does that.
Myself, on every flight, a short VFR hop or a 900nm airways route, always carry a whole-route printout, enroute 1"=10nm sections (on long trips), and a plog.
Not a wind corrected plog, mind you... because I plan to always use radio nav. If the GPS satellites got shot down by Putin, I would use VORs (and advise ATC), and if I got a total electrical failure I would use the Garmin 496 in the yoke and fly the filed route by sticking one waypoint in after another, off the printed plog, using DCT.
By deviating from it?
Ah, but if you were OCAS initially, no ATC unit would have had the authority to issue any kind of "clearance" anyway