Why not?

OK, looks like "microsoftsupport.com" is taken, but GoDaddy is happy to offer me alternatives like microsoftsupport.app, microsoftsupport.site, microsoftsupport.tv, or microsoftsupport.uk that should work equally well for scam purposes. Or microsoftpcsupport.com is available, if a ".com" is particularly desirable.

Doesn't Microsoft use a thousand different domains, most of which look sketchy? What if you receive an email from microsofts-support@live.com? Could you immediately tell that it is not legitimate compared to, e.g. contact@microsoftsupport.com?

They couldn't get it to work on Linux anyway. So I just stopped and never got the issue resolved...