For those people, yeah.
Remember, no full-time IT staff, generally they are (or were) supported by Geek Squad (hahahaha...), and then there’s the per-seat licensing (remember, gotta have that or it doesn’t work).
From Joe Small Businessman’s point of view, which is easier? Getting a new computer with Dell and mapping a network drive or three and being ready to go instantly, or having to set up the computer, then having to set up AD for that computer, then discovering you can’t because SBS limits you to 5 users (or whatever the ludicrously small number is), having to call Microsoft, etc., etc.
Remember, he’s doing this without benefit of IT staff on hand, usually.
OK. So "those people" are 80% of your customer base, and you're ready to translate that directly into what works in a corporate environment.