The distortion caused by worn fine line contact edges causes linear distortion of a type that is not annoying, but works to decay the soundstage, imaging, detail, overall intelligibility and high frequency extension. The high frequency distortion can be several other things, but I don’t think it is a sign of a worn stylus and is NOT a sign of a misaligned stylus. The two most likely culprits are a very dirty stylus (happens sometimes if you use gel cleaners, extended use of the magic eraser in a humid environment or never wet clean your stylus) and problems with your tonearm (either not enough or too much anti-skating, horizontal forces generated by twisted wires or bad bearings). Third most likely cause is that you are listening to groove damage.
I’ve never seen a USB scope capable of resolving well enough to show fine line contact stylus wear - and I’ve experimented with many USB scopes. You need an optical scope for that.
In any case, "several years" suggests you passed the 1,000 hour use mark a while ago if you listen for a few hours a week. It is probably time for a re-tipping.