> BLE broadcasts beacons much more consistently and generates a lot of data to filter, but they also change MACs.

Hah! I wish this were true. The overwhelming majority of BLE widgets don't use resolvable random private addresses. They could, they just don't. A huge share of the industry is just copy-pasting Nordic sample code until they have a shippable product, and last I checked, exactly one (1) Nordic sample project enables RRPAs. Nordic treats it as an edge case, and everyone else follows along.

And that's besides the issue that the RRPA rotation algorithm is pretty contrived. I'd be shocked if some three-letter hasn't already built a tool for tracking devices that use it.