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I don't print any abrasive materials at all. Pretty much only normal PLA and PETG.
I noticed, that my print quality gradually went down quite a bit, especially in the last few prints. I had a lot of stringing, weird blobs, and scarred surfaces.
Now, the print quality is as good as it should be!
They are dirt cheap. You can get a set of 10-15 generic ones, in different sizes, for only a few bucks. Don't forget that they are consumables.
If you're a Klipper user, odds are you'll have easy access to both print hours and filament length extruded. Some marlin printers also track this information as well.
Granted, nozzle wear is also filament specific, but it's better than nothing.