Obviously we can't be truly certain without running an experiment or few, but...
1) If they're being forced to do something, that suggests someone doesn't believe they would do it voluntarily. Nobody more suspicious than the person who forces others to do things for their own good.
2) Businesses are invariably blamed for inflation. Every single time the subject comes up organically somebody pipes up to blame "greedy businesses"; it is basically a meme. Some business owners would start up a non-inflating currency just to escape that. They don't want to be political scapegoats.
3) You can spot a bunch of banking crisises coming a mile away, the financial system seems to be mathematically guaranteed to collapse from time to time as I understand it. If given the choice a bunch of people would rather sign up for alternative systems that only enter a crisis state unexpectedly. That includes small business owners.
Would they still accept USD? In the US, probably. But a bunch of alternatives would crop up and it is by no means guarenteed that the USD would be competitive. The US Fed manages the currency and they do a terrible job.