OP would still get better performance with the current system and a new GPU vs the 970 with a new CPU although with the money 4790k's still fetch I'd still be tempted selling the MB/CPU/ram and replacing with a B560/11400F/ram which should give a nice boost while also costing very little in terms of net spend and sitting on that for a year or two till the DDR5 platforms mature.
No doubt. But have you not noticed that GPUs are pretty ridiculously priced at the moment. Instead of spending £1000 on a 2080ti now, spend £600 on the rest of the system and wait for £400 to buy a decent 2nd had graphics card later once the mining bubble bursts.
I agree with you both to a certain extent. I'm in the very unfortunate spot of wanting/needing (yearning) to upgrade, but whereas a GPU upgrade under normal circumstances would be the obvious move, under these very particular circumstances, it sort of does make sense to do everything else now, then the GPU when prices hopefully normalise to something more reasonable. With that said, the 4790k isn't struggling with anything and it really is only the GPU that's holding me back. So doing a platform change now doesn't really get me anything tangible. And that's the reason I realised, a much as it sucks, if I want an upgrade to my current experience, buying a GPU has to be part of it.