I use both a physical sim (personal) and eSim (work) with a second eSim that I can enable and recharge when going outside of the EU so I don’t get huge roaming charges. When I’m at home it’s disabled so I only have the other two active

It’s definitely possible if you’re going back to Windows 2000, but I don’t think commercial engines are going to get you there, you’d probably have to use the Win32 api directly (or something like SDL) with a software renderer or a very old version of DirectX. I’m not sure about Windows 95 and 98, it might be possible but I don’t have experience going that far back. I’m pretty sure it’s not going to be possible with Godot 3 or 4, maybe with Godot 2 or older versions if you can still find those online

Google ignores robots.txt so that won’t do much I’m afraid. You need to add special tags in the header of every page to block Google from indexing that page: source