Probably not worthless data but also I don't think it is a good wear indicator. UOA IMO are not a tool for tracking engine wear.Some have said this is worthless data but I cannot ignore it:
Don't get me wrong, I do UOA on almost every oil change I do. Really at best all it tells me that an oil is still serviceable or not.
I mean really what can I glean from one UOA that says 22ppm fe wear against another that say's 28ppm fe wear. I don't drive my vehicles in a lab so no two UOA have exactly the same conditions.
I spend a bit of money on the tests but for me it is just for the fun of it. Maybe I might use the data to extend my intervals but that's all.