I had first suggested this over a decade ago when at another library that was struggling how to balance its combination of branch & research library users & the sort of requests they might make. While no longer there, I still see it as a potentially useful means for staff to develop their request processes & create limits within limits.

What I'd like to see is the ability to not only set a hold threshold, but as is the case for the Max Items A-D allowed as applied to checkouts, allow a similar breakdown for holds.

Optimally, this would allow libraries to group batches of ITYPEs together & either exempt them from the overall max holds or assign them a limit within that maximum, & libraries would have a range similar to A-D (or take even greater advantage of the letters available in the alphabet!) to create whatever local limits & combinations they might desire. For example 50 holds, 10 of which can be DVDs, 1 of which can be hotspots, etc.