Not if you want to digitize the most microfilm for the least amount of money.
I approach programming the same way. If I've got 100 bugs to fix, I'll start by fixing the easy ones first, and the hard ones afterwards. This unblocks the most users in the least amount of time.
Yes, sure, the group should have done that a decade ago, when the film wasn't degraded as much, but nobody ever wants to pay for the things that must be done. It probably cost 6 figures to do something like that.
All of this to say that the digital scanning of a large archive like this with very much known deteriorating stock will not be done in any manner of "automated" way like the GP suggests.
So run the rest through the automated scanner.
Oh wait, that isn't happening, either, because they are not the most "at risk".
I can pretty much predict where this is going. It will all be lost.
In your simplistic concept of drop in a new roll every time someone walks by, how is this getting accomplished?