Size matters
Businesses with 2.5, 25 and 250 employees are all often described as SMBs but will require quite different levels of support. We are bombarded with offers to provide us with "support" but the targeting is way off sometimes - the number of staff actually using computers (with a keyboard) in a business can vary widely.
@Claptrap314 It's quite difficult to get folks to drop windows after growing up with it and being dependent on it for critical bits of kit you have no control over (if you are a SMB). By comparison dumping MS Office was easy.