Well - the goal is to buy a 4k 32 later this year. I know a 3070 is going to struggle with that, but the option to plus up to a 5800 is a definite nice to have.I don't necessarily know if it is worth the extra money or not in your case though. But at least it's an option
I started poking about, and even though 5800x 'likes' 3600 / 4000mhz RAM... 2133 appears to be still the default. ( https://premiumbuilds.com/features/zen-3-ram-speeds-benchmark-analysis/ ) -- a fact that quite surprises me. IDKW - but I would have thought that 2133mhz would have been a legacy default, and the 'default' timing / mem speed would move up with each iteration of CPU.
Guessing that is b/c Mem makers are pushing out RAM for multiple generations and allowing users / builders to enable profiles on their own?