Yeah, last year I upgraded from my old R-Pi Umbrel to a Start9. The R-Pis just aren't great for running full nodes anymore. My Umbrel was really struggling and I had to reboot the damn thing every few days or it would fall out of sync with the Bitcoin chain. 

 I upgraded from R-Pi by buying a mini pc and installed Start9 on it. I will never go back! The documents are accurate and the software runs well. 
I never had problems with my umbrel, but I only run a few apps on it.