TIS-100 was one example of the general context of "programming in games" or "games as programming" which I've actually played and enjoyed. I get that Factorio has a different game loop and broader sandbox than TIS-100, so I can see where you're coming from. Factorio, on the outset however, hasn't quite gripped me. Again, it might be this particular one's art and overall setup, but TBH I also think that outside of constrained puzzling as you say, I'm much more inclined to work on all those little side projects desperately waiting for attention...

In some ways, this reminds me of Guitar Hero and its set of games. As great as those are for getting into music, once you're already into it, it can feel like time that could have been better spent on deliberate practice or at least some good old jamming for fun. I do love games, as long as they don't take up too much time and have an ending. In an earlier life I've already burned plenty of midnight oil on similarly "open ended" play (4X and other strategy or construction games are the worst traps for me). I'd rather finish BG3 at some point - at least that one has a definitive end to the player's story and is a bit more of a change of scenery from what I do for a living (building and optimizing systems).

Then again... maybe I'll finally try Satisfactory which I own through Humble Choice IIRC; or maybe I should avoid doing that at all costs for the reasons above... ;)

TL;DR IT'S A TRAP