I've spent a lot of time dabbling with digital audio (especially recording) and my limited experience with Linux audio setups were difficult to say the least.

Now, this may be changing with Ubuntu Studio, but unfortunately a majority of commercial hardware is still strictly Windows/Mac (and sometimes spotty at that). Our mostly self-recorded/produced/mixed album (http://glasscannonband.com/albums/the-chill-room) was done in Windows 7 with Sonar with a Firepod 24bit firewire interface. It wasn't perfect, but it worked.

I couldn't imagine walking into a recording session with a Linux setup and running into a bug (I experienced dozens upon dozens while experimenting with Linux) and trying to sort it all out while the band waits.

Again, I think this is just a time vs. money thing. The post even alludes to this ($3000 upgrade vs. $600).

If you wanna do digital recording, save yourself the hassle: go Mac or Windows with the wonderful REAPER software (from the same dudes that developed WinAmp!).