Py is as hardcore as it gets, and a lot of even experienced players don't pick it up for that reason.
That being said, the Factorio crowd I rub shoulders with 1500 hours is not a lot. Heck, i myself am about 4-5k hours of gameplay and mine are rookie numbers :D
Factorio allows for an extremely wide ways to play it, multiplayer is it's own world entirely if you find a decent crew to play with (there are many communities around Factorio).
And then there's Clusterio that opens a whole new dimension of what's possible.
You spend a small amount of time each day meticulously crafting the factory/garden to unwind. The time it takes isn't a problem. The goal isn't to 'win'.
I've played Factorio (and Satisfactory, and DSP) and I understand that you can just do a bit here and a bit there but still. And I've spent 1,500 hours in some games (with a couple of hours a night, most - but not all - nights) too. Even so, it's intimidating to start such an endeavour.
Ahh, so if I start a game now, and play a reasonable (dedicated, honestly) 2 hours a night, every day, I'll have completed it in 2025.
Wild. Not for me!