Like a fox!
That is a lucky exception and you are not at all the normal. As a test I took my same 5800X + my same 4400 Mhz ram kit that will do 3800 Mhz together in my X570 system and tried them both in the X370 Taichi computer this past summer. I like to think I'm fairly experienced in tuning and overclocking Ryzen systems now. I've built, overclocked and tuned about 50-55 (I lost count) different Ryzen systems building them for other people so far. I could not get this X370 Taichi system to run the ram above 3333 Mhz with the same hardware that will do 3800 stable in my X570 system. So therefore I was trying to help folks stick to what's realistic for this platform and stick to ram kits that we know will work 100% for everyone instead of trying to "aim high" for something that may not work or may work 25% (or less) of the time. Steve at Gamer's Nexus even did a video testing the performance of ram with the Ryzen 5000 series processors and demonstrated that the difference in 3200 CL-14 ram and 3800 ram on a 5000 series chip is about +/- 7% to 10% anyway. 3200 CL-14 is fast enough for general usage for most people.I haven't had an issue running higher mem clocks on my 3900x (previous cpu) or my 5800x3d.
This is 100% stable and I could go on the memory clocks if I was willing to up the SOC voltage (currently at 1V):