Typhoon93, as a serious answer, we don't maintain a force of 7 squadrons up until OSD then chop the whole lot en masse. There's a phased draw-down, so on a given year, there are only handfuls of pilots who need new jobs (circa 15 per front line squadron).
Some may be sent to QFI roles like they would be regardless of the GR4's fate, and their future employment can be worried about further down the line. Some will get promoted or move to staff officer jobs. Some will go to Typhoon, some to Reaper, some to completely different aircraft streams, some will leave, and others will go to more esoteric jobs.
The last Sqn I was on that folded, I can't think of any pilot who isn't still flying something, except by choice.