The awkward part is that software has a habit of racing toward free once it becomes good enough
Has it? Jira, Teams, Slack, Google Meet, Cisco WebX... There's obviously Jitsi but I don't see companies racing towards it. When it comes to SaaS most companies prefer to pay and be done with it. Few are choosing to host open source solutions. Windows and Mac are also way more popular than Linux in office settings. With LLMs hosting it will be even more complicated because companies will have to invest heavily in GPUs.
If the bubble bursts companies will lose funds to work on new models but someone will still be able to offer existing models as a service. Companies will chose the one with better price and functionality. Being free or not will have little to do with it.