Re: Or upgrade
Yup, because software assurance is free. Fuckwit.
And as for AD upgrades not requiring downtime - that's a dubious statement at best. Especially in the SoHo-SMB space where you're unlikely to have multiple servers to balance out the load while the operating system upgrade is ongoing - and that's after you've moved any data shares, exchange, etc off the server(s) you need to upgrade. Because new servers aren't free either.
Typical MS (as it's pretty much established that AC is a shill - or just utterly deluded) - absolutely no concern for anyone but the enterprise.