Thanks for the replies @voxelwise, @TvH and @WimVDD it's been helpful.
I don't want to race (nor do I possess the fitness currently) but I want to get back out into the woods. The last bike I rode was a late 2000's Norco Sasquatch that had a more modern RockShox Sektor fork and although old it worked pretty well. Regrettably, I sold that frame and swapped the parts onto a mid-2000s Orange Hitman which I haven't ridden off road yet but can already tell was a mistake. I'm trying to decide whether to transfer these parts onto another, more suitable frame, sell the whole thing and buy something retro or to bite the bullet, drop proper cash on a modern bike.