Thanks, guys.

Yes, we are looking at this in MSSQL, so we can run scripts to see what indexes were used. But as Michael said, that won't tell us what is possibly referenced in code but on views or view options that haven't been used.

And this is partially in preparation for us to move to 19.x, where we will be using Client-side indexes.

So, let's look at this from another angle. What are all the places that can reference an index? The ones I know of off the top of my head are:

Ordering
Request_Find
Find (procedural)
Request_Read

I'm willing to accept that I may not be able to automagically identify all the indexes used, but I'd like to do something to identify what it can as well as places that I need to manually check...