Speaking from a personal point of view, GameDev is a 'loss leader'...
The majority of my patreon backing comes from people following my Youtube tutorials, as does the majority of the positive feedback I get... youtube vids take a week where as gamedev takes 8 months ... so they also take less time and cause less stress.
I've said it before, and I'll say it again, people in the retro community are more interested in youtuber video creators than game devs - last time I said It I was speculating, now I'm saying it first hand.
Heck, it is what it is, but I'm not stupid, I'm going to allocate my time and effort to what I get the most positive return for, I'm trying to shift things so future games will be based around the code created for the tutorials, and will be more multiplatform to attract a larger possible audience, but if I had to give something up, I'd ditch the gamedev, and keep up the youtube vids - that's just common sense.
The other problem is, supporting more platforms means less platform specific features, so things like CPC+ sprites and hardware scrolling are not likely.