And you have to wonder, what kind of boom in innovation could lots of reasonably priced office space support? What gov policy cold push landlords and banks to accept reality? Vacancy tax? Change to bank regulations?
Make usury illegal again?
(I mean the classical definition not the watered down modern one)
The timeframe of regulatory changes here is not worth any investment. The turnover will continue to happen, it's too complicated to try to change, and you'd probably create nasty unexpected side effects.