http://blog.cyrusmehta.com/2020/11/proposal-for-the-biden-administrationusing-the-dual-date-visa-bulletin-to-allow-the-maximum-number-of-adjustment-of-status-filings.html
Even CATO Institute sent this in its list of proposals. Of course it does not mean administration will/has to do anything but legally they can do and nothing is stopping them from moving the Date of Filing aggressively.
My point being legally there is no limit as to how much date of filing AoS they can take. Only number of GC's are legally bound and numbered/year.