I was talking about 6000 mhz might also be the sweet spot for intel memory , not what intel max can handle, the ratio between the speed,cl and price, 6000 mhz might be the sweetspot or just a good choice above standard speed
Sweetspot means the point at which further improvements don't offer measurably better performance. For AMD this is around 6000 MT. For Intel, this is around 8000 MT.
A price optimized kit is a price optimized kit, it's not the sweetspot.
I.e. Zen 2 was 3600 MT, Zen 3 was 3800, neither of these were related to price, it's just the AMD recommended memory speed that most chips could do in sync with IF.
With tuning you could do 3800 on some Zen 2 and 4000 on some Zen 3 chips, but the gains aren't significant.
For gaming, DDR5 doesn't make sense over DDR4 unless you're buying the platform to future proof, you're locked into it (AMD) or you want ultra high capacity/speed.
DDR5 6000/36 (12ns) is an average kit, and around what most people are willing to pay for, and is the equivalent of DDR4 3000/18 for gaming, which is a crappy latency.
DDR4 3600/14 is comfortably possible on AMD, and 4000/14 on Intel, sometimes you can hit 4133/4200 MT on good silicon. 4200/14 is 6.6 ns absolute latency. 4000/14 is 7 ns. 6000/36 is 12 ns latency.
Comparably, 8000/32 is 8ns, so you're getting to around DDR4 absolute latency. If you have a good two dimm motherboard, and high bin CPU IMC and memory, you can push 8200 sub 30ns, which would get you into the low 7 ns.
Latency is what matters for gaming performance, bandwidth is nice, but FPS doesn't always scale with it, and not at the penalty of latency. Higher bandwidth kits are typically faster because their latency is lower, not because the bandwidth is higher.
Bandwidth is really nice for some workstation tasks and professional software.
These numbers don't make sense to aim for unless you know how to tune memory and have a strong GPU. XMP/EXPO kits are almost universally mediocre timings wise with the exception of maybe 5-10% of kits (that most people don't buy). Personally I use a 3200/14 dual rank B die kit that (because it's B die) I bought, since I knew it would overclock well. Currently that kit sits at 3933/14 with the rest of the subtimings better than stock. You literally can't buy XMP kits that offer that MT/timing/capacity combo stock.
In the same vein, if you're serious, you look for a Hynix A die kit that's cheap, at the capacity you want, and tune it yourself. If you know what you're doing you can easily turn a 62/6400 kit into an 7600/8000 MT kit, for daily use.
All of this only really matters if you have a strong GPU and a high refresh rate monitor, otherwise the only thing you'll be achieving is increasing your 1/0.1% low FPS, which is still worth doing and leads to a much smoother experience.