Some companies prefer Dell as an American held company; for security reasons. Dell’s Precision line supports high-end needs such as 3d modeling, theoretical testing for real world applications, statistical analysis of large datasets, etc.
That is where Dell fits. And yes, they have consumer models. I don’t care for the latter.
Well, prior to this, Donut lost most of their host for the YT channel. I’m guessing they saw the writing on the wall and left.