No, it isn’t. It isn’t worth it under any circumstances, really.
Here is what I think and yes, I am making assumptions here:
The Intel side
The 8700k is the maximum performance Intel can squeeze out of six cores. I don’t think there is any headroom left. It is still skylake mostly with optimized production process (kaby) and added two cores (covfefe). We are hitting 5GHz on some of those chips, as we saw on kaby lake. But you can only optimize so much. The increase from 6700k to 7700k was already marginal at best. So, the only way to get even more performance would be adding even more cores.
Here is the problem: Some of these Z370 boards have VRM designs that are subpar for overclocked six cores and will explode if someone just mentions eight cores. I honestly don’t think all of these boards were meant to be Z370. The specs for those boards given out by Intel can not be meant for high frequency or more cores, let alone both. I mean, just look at this:
That looks worse than some B350 boards. Yes, this is the cheapest Z370 board at alternate (still 115,- bucks) and it is the worst example I could find. But it is not the only one.
Intel is packing every single die that isn’t completely broken just to get some chips out the door as fast as possible. Think about how different some oc results were. That is not the Intel way, usually we should be seeing very consistent maximum clocks.
I think they want to just get this over with and move on, I think Z370 is the stop gap and we might see only very few lower budget boards, if any. I also think there won’t be any upgrade path for Z370 at all.
The AMD side
Ryzen is doing fine and still improving. There are still some things to improve on, the memory controller needs work, the clock rates have to go up. Both is manageable with coming iterations of the architecture. Meanwhile the boards are already designed for eight cores, at least at stock speeds. And AM4 is here to stay, 2020 was AMDs plan and I don’t see that changing.
Buy Covfefe Lake and you are already stuck.
Buy B350 or X370 and enjoy what is about to come.
… that became way more text than I wanted to write.