If a company goes hard towards replacing employees with AI, it will be difficult to just rehire humans to do that work again after AI prices raise. It could be easily too expensive to pay for what is needed to revert back. AI companies know this and will be able to ballpark calculate the max they can charge. Cost is one part of it but it would incur issues, bugs, services interruptions, etc. Some companies will form using only AI from the start so it would be even more difficult to just hire a human to do the job.
Think about all the ancient computer infrastructure holding companies and government departments together by a thread nowadays. It's so much easier and safer to pay the new, higher bill and keep it running as is. It will be a similar situation to a company running some ancient services on an AS/400 bc it's too difficult/costly to change. Instead, you're soft-locked into ChatGPT, Claude, etc.