We are not there, yet, but if AI could replace a sizable amount of workers, the economic system will be put to a very hard test. Moreover, companies could be less willing to pay for services that their internal AIs can handle or build from scratch.

Instead of needing 1000 engineers to build a new product, you'll need 100 now. Those 900 engineers will be working for 9 new companies that weren't viable before because the cost was too big but is now viable. IE. those 9 new companies could never be profitable if it required 1000 engineers each but can totally sustain itself with 100 engineers each.