|Sender ID didn't actually come on a cassette tape.|
But that's all super old news at this point. Hotmail -- I mean Outlook.com -- has long switched over to checking DKIM and SPF like so many other large email and webmail providers.
There's no harm if you're still publishing a Sender ID record, but if you're planning to set one up when configuring your new domain, don't bother. SPF and DKIM are where it's at in 2016.