Like others I use additional drives for storage etc. Anything important is either on an internal WD drive or an external WD My Book. They're also backed up on a mixture of Google, Apple and MS cloud services. 60GB is perfectly usable for an OS and other gubbins but my sweet spot is the 120GB drive in my desktop. Perfect for the OS and my (ahem) video work.
And never mind boot times, what about a full clean Windows install?! I think my record from formatting the drive to working desktop is about 14 minutes using a USB drive rather than CDs/DVDs and an SSD. A few years ago you'd have to set most of the day on one side.