This is sooo true. I have multiple computing ideas that I want to do just for fun but I am not doing because each requires buying a mini-pc, sometimes with a screen too, and put Linux + my app on it.
At the same time I have multiple old phones laying around, Pixels, iPhones, Galaxy that are out of date, have cracked screens or worn out batteries.
Each one of these old phones have same or more computing power than a $300 mini-pc, but I can't use them because I can't just ssh into them and install an app...
Another +1 from me at 62 years. My problem is this has led to me feeling like I am tech lead for a team of a dozen excellent developers, but I have no task for them!
I would question whether a PWM "technically" counts as digital... It is on and off, sure, but so is a mechanical power switch, which few would describe as digital. "Digital" is more when we get higher level values represented by multiple signals that are on or off (aka bits).