There will certainly be some people that would prefer to take a WFH job taking an in-person job because 'any offer is an offer', but unless you foresee 10% real

There will certainly be some people that would prefer to take a WFH job taking an in-person job because 'any offer is an offer', but unless you foresee 10% real unemployement among white-collar skilled labor, I don't see this being a major factor in the long-term longevity of fully-remote as a business model. There will be jobs available, some will be WFH, some will be in-person. The WFH jobs will be able to get away with paying 10% less and the companies, especially small companies, will save money on office space. Those advantages and disadvantages will play out regardless of the quality of the labor market.