I was mostly giving DAW as an example though, same would go to any kind of specialized software.
EDIT: unrelated but, from Reaper purchase page:
> If you own multiple computers, you may install the same license key on all of them, as long as you only use REAPER on one computer at a time.
I love this, let's not pretend people have a single computer. A have multiple linux workstations, and an OSX workstation. As long as it's me, the person who bought it, is using the software on different machines, I should be able to get away with single license.