I admit that I've only owned 2 10/22's in my life so maybe I haven't seen it all. But in my experience, insufficient spring tension in the magazine will result in either outright complete failures to feed (especially in the last few rounds in the magazine) or half feeding that causes the cartridge to get badly mangled between the bolt and the rear of the barrel. Generally, I clean the magazines on a semi-regular basis and check the tension when I reassemble, so I don't have many issues at all with failures to feed. FWIW, even the oldest factory 10/22 magazines I own - which are from the late 70's - still feed reliably if they're somewhat clean and have enough tension.
Failures to eject have been caused either by the gun being dirty (but my 10/22's have always handled an awful lot of dirt and grime without real reliability issues) or in one case by a bad extractor. Replacing the factory extractor (probably defective) with a VQ extractor solved the problem immediately. As you mentioned, inconsistent ammo can also cause this.
So I guess my point is that as long as my 10/22 has no broken parts, is somewhat clean, and is using decent ammunition thats one rung above the bulk pack stuff in quality, it runs as reliably as anything else. It does not jam and stovepipe like crazy. If it did, I'd know that something was wrong with it.
FWIW, my friend's old Marlin 60 also runs well for about 300 rounds. After that, it gets dirty and starts to have failures to feed. But as long as it's clean it's pretty reliable. I don't know if they all start to malfunction at that point, but I know that his does. It might be more accurate than my 10/22 but the truth is, neither of us have ever stopped shooting at aluminum cans, old fruit, clay pigeons, or balloons long enough to test them against each other on targets. For our purposes, both are entirely adequate.