I've gone through too many 15-22 mags. The main point of failure I see is the polymer mag lips start to widen which leads to failures to feed. The standard test is to load a few rounds (doesn't have to be the whole mag) and push the nose of the bullet up. If it pivots 90 degrees to stand straight up, it's time to chuck the mag. Keep the spring and follower as backups (I have had a spring snap on me.)
I haven't had binding issues (out of about 40 mags). However, when I first buy them I disassemble, brush the inside with a mag brush, and lube the follower and spring with a silicone spray.
After EVERY match I clean the top of the mag, feedlips, and the follower with a paper towel and a Q-tip type swab. Rimfire is very dirty and cleaning each time helps prevent buildup. Every 10 or so matches I'll do the full disassembly and cleaning of the mags like when I first get them.
Observation 1: The FDE material seems to be softer than the black mags material and seem to go bad faster.
Observation 2: The 10 rounders may be a bit stiffer than the 25s and last longer. I'm still working through my first batch of 10.
There was an excellent aftermarket 40 rd mag with metal feedlips. S&W hit them wit a cease-and-desist and they are now out of business. It would be nice to have an aftermarket option. The only one I know of uses a S&W 10 round body to feed a drum mag. Since they are using a S&W part, they can get away with it.