I also noticed that the current Ryzen mobile 4000 series tops out at 32GB of memory supported, which sadly excludes them from even possibly being in the 2020 16” MBP since Apple’s already been selling 64GB systems. :/
All desktop Ryzen CPUs as well as mobos with 4 DDR slots support 128GB of memory (and there are reports that dmidecode shows the support of 256GB on some) but sadly there is no info on that for the laptops.
