I don’t think Factorio ever goes on sale but imo it’s worth full price.
If you like Satisfactory, there’s an extremely high chance you’ll like Factorio. The main differences are the obvious 2D top-down vs 3D 1st person and Factorio has a robust military/combat system with base defense while Satisfactory is mostly peaceful unless you’re exploring.
It’s way easier to move from one Linux distro to another if Valve starts enshittifying SteamOS (which would really suck) than it is to move from Windows to Linux. Either way this is a good stepping stone that’s well supported.