There are no inherent stability issues with AMD. However, they are very particular about the memory because of the graphics architecture. That is probably where any anecdotal stability issues arise. It would be a good idea to buy only from the QVL for them.
Intels, you can throw pretty much any memory and it will work and faster memory won’t make any difference.
In motherboards, Asus, Gigabyte and MSI are the top three and I would rank them as Asus > MSI > Gigabyte with Asus leading by a mile. But they all suck for support. Asus boards like others are either DOA in which case you exchange with retailer or they work forever, so you don’t have to contact their support. I second the recommendation to buy their CSM models if longer term support for drivers is a concern. They stop driver support too early for others.
The best support for PC components is from EVGA.
The only brand I would recommend against is Asrock. Uneven quality and terrible support. They are the Ikea of electronics.
AMD graphics are better value for hard core gaming performance but they are not as power efficient as Nvidia with implications on noise and heat. Nvidia would be a better bet for non-gaming use with a small premium.