That's begging the question. The competitive wage will not rise to FAANG levels just because some FAANG jobs are available in every city. It's the worker's problem if they can't get the that FAANG job anyway, because the number of FAANG jobs hasn't changes and instead they've just been diluted over 100x as many cities and a much larger talent pool.
Affordability is relevant because it's one aspect affecting how much the competitive wage will rise.
My forecast is that prior to the pandemic there were X “FAANG-paying jobs” across ~5 big cities in the US. After wider remote work normalizes in the next two years, there will be 10X that number of jobs and the average wage will likely only go up.
There will be room for all the headcount there currently is across the ~5 largest tech hubs, plus nine times that amount in additional, new headcount. People from all kinds of regions of the US and the world will have much greater chances at these jobs. And it will create spillover effects where lesser tier employers have to raise wages to compete for the remaining candidate pool and so on.