I don't think you build an AMD system to put £300 worth of ram in it anyway.
Why is that nonsense. Using expensive fast low latency memory (3200 C14) is a normal thing for Ryzen. Because, having Infinity Fabric, Ryzens get a bigger benefit from fast low latency RAM, than Intels.
I aim to Zen 2 - Ryzen 9 3800X (16c/32t) this summer. And i will use my old 32GB $400 worth kit. Since it in 2 sticks with Samsung B-die chips, gonna fit perfect for Ryzen.
Many streamers and prosumers who using Ryzen 7 1700 or Ryzen 7 2700X CPUs, has also expensive low latency 16/32GB RAM kits (not mention TR4 guys with 64GB kits). Because it have sense for AM4 / TR4 platforms.
On the other side, Intel performs decent even with 2666 C19 cheap memory. Easier to OC any chips, Hynix or even Micron. Much higher OC cap, 4000MHz+. But on AMDs AM4/TR4 platforms RAM OC cap is low yet, you can't pass 3600MHz mark. And even 3600MHz is hard af.