IMO, companies should go source available by default instead of bait and switch FOSS. If your business model isn't compatible with FOSS (which I would argue most aren't), don't do it.

I think being honest with your intentions up front has value, and you can charge for your software in a way that doesn't create a financial cliff when converting from free to paid (make up margins with volume etc).

I hope the rest of the ecosystem starts to feel this way and becomes comfortable paying for software again, especially from a sustainability perspective.