Is your view that there’s nothing valuable in a UOA? I remember asking you in the past what sources of info you consider legitimate and you never responded. Do you consider UOA a source of legitimate info?
I went back and searched your username for UOA as well as for my username, just in case I missed something. I wasn't able to locate any post where you directed this question at me, sorry.
UOA's, used properly, are very useful tools, a position I've made quite clear several times in the past, and this is base on my extensive discussions with people like Doug Hillary, who used them professionally as part of a fleet testing regimen.
The problem, and my criticism, of UOA's used recreationally, is that people attempt to ascribe a level of accuracy and detail to the tool that it isn't capable of providing, particularly the $30 type we so often see on here from Blackstone, which don't even include GC fuel.
This is like trying to use post-processed sampling of a municipal waste stream to determine what the best medication is "oh, we got a 2ppm uptick in this bacteria, Kirkland brand ibuprofen must be inferior to Tylenol!". It can tell you if you got an outbreak of C-Diff for example, but it doesn't tell you where (though you will have an idea as to the potential sources) or how severe it is. Minute variances of expected components are not a barometer for product quality/performance.
Of course people want UOA's to be this inexpensive and convenient source of profound insight into lubricant performance, because how awesome would it be if you could just get a series of UOA's of different brands and know which oil is the "best"? It scratches an itch. But that's not the purpose of the tool.
UOA's are intentioned to provide data on the health of a lubricant in service and to inform as to the suitability for continued use (overall contamination levels, TBN/TAN, fuel...etc). As well as to provide insight as to any unexpected contaminants or potential developing mechanical issues. This involves establishing a trend, then watching for significant deviations from that trend, which, if this occurs, is an actionable item, prompting further investigation into the source of the contamination, such as a coolant leak, air intake tract leak, cam follower failing...etc. Used in this manner, you can maximize the service life of the lubricant while also gaining insight into potential issues with the equipment. This can work to minimize downtime as well as aide in avoiding expensive issues by catching them early.