I can't imagine they want to support two separate account systems, especially with the amount of potential PII involved (like eye/face tracking training data).
This required change is heavily communicated, when you put on the headset. Nobody will be surprised when their account stops working. Your comment makes it sound like it could possibly happen on accident.
Earlier this year I packed up a lot of my computer gear and stored in at the in-laws house, because we were putting our house on the market and this got us ahead on moving into a new place. Then the housing market tanked, my stuff including a Quest 2 is still sitting there, many months later, and I'll maybe be able to get back to it now mid next year.
I'm learning from you here now that I'm gonna lose all the paid content I have on my account?