Dell AMDs Once
Once upon a time, a decade or so ago, Dell did have a few AMD models. I know because I purchased three C521 mini-tower models with dual-core AMD processors. They ran very nicely for a number of years, finally dying off one-by-one as their motherboard capacitors failed. They were good performance at a good price at the time and yes, Dell could do better for their customers if they still offered some AMD models in their lineup.
Truth is, next time I need to replace a desktop unit (currently Dell XPS 8900 i5 Skylake), I'lll be looking for an AMD-powered system first, not a Dell system first.