I’m of the replace the frame school when it comes to upgrading.
Not that I’ve ever had a 5spot, but have slowly ungraded frame, then parts, then frame again over time. Not the most economic strategy but down to cash flow mainly. And some hope hubs have helped with changing standards.
Anyway I just went from a 2008 pitch frame, which there was a lot of love for, to a 2012 YT wicked, and its night and day. Not that much changed, but rear through axle, tapered HT (tho still straight steerer) and newer geo really do seem to make a difference. At any rate bike has become a lot more future proof.
So anyway all I’m really saying is I would move on if I were you. Ideally you could pick up a bargain frame which is 2 to 3 years old and which you can still use most of you bits with (mine was £250). Then there’s the dropper etc etc to buy.
But perhaps parts wise you are too far behind the curve already, and/or perhaps you don’t have much to spend?
Otherwise try to get ~950 quid together and pick up one of the barganous complete bikes on here. That makes most sense money- wise
Scuse the ramble!