Afaik 2 machines are almost mandatory 1. Dev machine 2. Email machine The 2 biggest orgs inside MS are Office and Windows, devs in both of them can't have a si

Afaik 2 machines are almost mandatory 1. Dev machine 2. Email machine The 2 biggest orgs inside MS are Office and Windows, devs in both of them can't have a single machine doing both the above tasks. (And VMs suck for disk based I/O, and that becomes a factor when you have multi-hour build time)