Ryzen loves extra ram! Look for b-die/e-die ram, you wont regret it! Or so I read before upgrading my PC. At the end of the day, I hesitated and lost the opportunity to buy that 100 dollar ram upgrade anyway because it was sold out and ram was in high demand due to the new CPU launch, and I'm glad I did . Would that extra 100 bucks be better off spent on a better graphics card or processor? It seems so.
https://www.techpowerup.com/review/amd-zen-2-memory-performance-scaling-benchmark/2.html
I have been a game engine developer for consoles since the PS2 days. The consoles are generally shitty stripped down hardware where one stick of low latency RAM at the time costs more than the entire console. RAM never ever was a bottleneck, and my specialty was allocators and bandwidth between the CPUs, GPUs and co-processors like FPUs, SPUs or VUs. That cheap shit RAM never once limited me. The problems were always in the memory controller on the motherboard, which decides which busses every memory access uses. Lower latency RAM can help hide this, but the mobo, CPU and GPU limit the RAM usage. Solve those bottlenecks first, then get lower latency RAM.
It depends on the use case. Also on the upgrade, is it more ram, faster ram, ECC. Often faster storage helps more for feeled performance, but if you have enough ram and use the same data all the time ram speed matters as well.