I do everything (short of arenas/stadiums). However, the purpose of doing this was to create the most flexible setup possible. It is not very loud (Wet cabs are run by 20/20, Dry by 2:90 or 20/20). The Switchblades allow me to create any number of presets and control the gain at any point. So, if I'm playing a smaller place, I'll use the 20/20s with 3 1 X 12 cabs. A bigger place, the 2:90 (for Dry) and larger cabs. I don't generally want to generate a ton of volume onstage. The Switchblades allow me to use the same presets but dial down the gain to power amp by any %. So, literally, this goes 40 dB to 120. The other 2 things that were extremely important to me were:
1.) To be able to run preamp + EFX to board. You'll note I have an Axe Ultra in there so I can get great emulations from that w/o using cabs at all but still use my pres & EFX if necessary (although the Axe does a great job by itself). I tried using the Axe alone for awhile but there are many times it does not compare well to my preamps/ amps/cabs
2.) Roll into studio and connect in seconds: the "master" Switchblade has stereo IO to a Lynx Aurora 16 converter. So, I can roll into my studio, or anybody else's, and hookup in 1 minute. Even if micing cabs, hookup < 5 mins. But, with direct hookup, I can do all kinds of reamping or simply use the devices in my rack in the studio (or visa versa). Basically, it is stereo plug n play.
3.) Easy to move/ set up. These are 2 racks (8 & 18). They come apart by detaching 4 audio cables, 4 midi cables & 1 power cable. So, setup/ take down is < 5 mins.
The only real negative is the programming time. Although the GUIs on the Axe/ Triaxis & Switchblades are great, we are still talking about 1000s of potential routings. Use of the Axe's 2 I/Os allows it to be used for amp/ cab emulations & simultaneously as an EFX loop. So, I can, for example, use the Axe's EFX/compression before Triaxis, back out to Triaxis and back in for delays, cabs... The Switchblade's GUIs make the programming a TON easier. I create various preamp/ amp combinations in one Switchblade, various EFX combinations in the other, and mix/ match.