Advise for CPU for parallel simulation

I'm working on a Macbook 2.3 GHz Intel Core i5 from 2013 with 8 GB 2133 MHz LPDDR3 RAM with 4 cores. For quite some regression models my computer takes 20 minutes or more, even in parallel mode. Specifically with multi level models with stan_glmer, but with loo as well. So, testing and comparing some 16 models takes for ever...

I thinking of a new machine with an AMD Ryzen cpu but I'm not sure whether the architecture supports all the packages in R is use. I know the stan-family of packages does, but I don't know for others. Should I stick with Intel or are the fast multi core Ryzen the best option?

So my question is how I could benefit from a cpu with ≥ 12 cores and more RAM.

Any advise would be nice.