I don't expect troubleshooting, but it's not isolated to just my company, my home computer did it too, not nearly as often, and it's been a while since it's happened there (probably since I only leave file explorer open for 30 seconds at a time).

And even if it's not technically part of the OS, will Windows even be in a useable state without it? Most things I see call it a "Core part of the OS," although those are also specific to Windows 10 so if 11 changed it, that's news to me. I dont see a difference. To most people (myself included), explorer.exe crashing and restarting looks just like Windows shitting itself, and since it's packaged with every Windows install, that perception really is hard to argue against despite what some technicality of it being an executable says.