The differences can be time, dollars invested, the quality of the relationship with the supplier, inherent tolerance, etc.
IMO, a loyal user is one who has a net positive experience with whatever and is willing to cut the supplier a little slack when the inevitable rough patches happen. Maybe even help out to see them through.
The others will move to something else.
Nothing wrong with either. We're individuals. As such we each our own unique blend of values and motivations.
Speaking of motivation(s), I'm not sure what label gets applied to those that move on to a different tool, but hang around to stir the pot. This category varies from blatant to subtle, but is disrespectful in any form - IMO, of course.