That’s sort of not very efficient since each PPV has it’s own cost from what I understand. I could be wrong. Other than that, once you place a hundred of those and then need a key change in PPV settings you’d have to go through every one of them to change that setting which is very counter productive.
Edit: Also PPV doesn’t generate a cubemap of the environment it’s placed in. Doing this on our own is time consuming. If it could be automated like “Update capture” in skylight or reflection captures that’d be of great help.