So, I make things for myself to replace commercial software that either doesn't exist or that is becoming (or will become) enshittified like all commercial software.
I like to cook, for instance. It's a hobby of mine. Cooking, BBQ, grilling, baking, all of it. So of course, I have recipes and they are important to me. I could spend all my time painstakingly entering all my recipes into recipes dot com or whatever, right? But of course, as soon as I do that, their barely usable app that does almost everything I want (and a hundred things I don't give a shit about) gets updated in the third update of the week (rolleyes) and they have completely changed the UI and on top of that, they removed a feature that I used daily.
OR - I could just make my own fucking app. Which I did. It's awesome, it does everything I need and nothing I don't. It also doesn't update every thirty seconds and become less and less usable or require me to completely overhaul my workflow because the programming staff and middle management need to justify their existences.
I also recently made a wishlist extension for Firefox, because Amazon removed the ability to add non-Amazon items to their wishlist. I have probably a dozen other ideas I'm working on at any given time. None of this is to make money, but just to make my life more convenient and unplug myself from the wider (bullshit) Internet as much as possible.
A family of products that no one will be able to buy, sounds great Sam! 👍