The g26 was fixed by ejecting that round and chambering another one. Maybe slightly slower than pulling out another gun
But faster than dropping and inserting another magazine. In my opinion, by stating the nagazine should be ripped out and replaced indicates a problem with the magazine itself.
Not all malfunctions require you to change out the mag. Most things are solved by a TRB. There are some that arent, and require the mag to be removed to solve the problem. A spare mag, and better yet, a second gun, will alleviate that problem.
Magazines are always a possible problem, especially if youre using them in a regular rotation. I use a specific set in practice, just to try and eliminate that issue in the guns I carry. I know a lot of people who only have what came with the gun, and thats all they use. Assuming they practice regularly, and the least bit realistically, those mags will likely get beat up and abused in short order in practice, and the probability goes up, that something can, and will go wrong.
If you shoot a lot, you know that things happen and stoppages occur. Its just inevitable, and the nature of the beast, and thats normally on a range where your not under any real stress. Ramp things up, and things tend come along with it.
Theres never a guarantee the next round will go bang when you expect it too, and thats why you practice immediate action drills, and to the point you dont have to think about it. If you dont, whats your plan? The time to have that worked out, is in regular and repetitive practice, so you dont have to think about doing it when it occurs for real. The last thing you want to have to do (actually, its something you really should never do), is stop and try to "diagnose" the problem during a bad time. You shouldnt have to think about what needs done. If the simple responses dont get it done right then in a second or two, then you need to do something else.
All of the above is just something that goes along with using an auto-loader. Revolvers have their own set of rules, and you practice them too, if you use one. Any of it is simply part of being proficient with what you use.
Id be willing to bet, that everyone here, probably has a spare tire in their car or truck. How often these days, do you have a "road" flat? I havent had one in over 15 years, and I normally drive 25-30000 "road" miles a year. Why carry a spare then? Simple, because when you need it, you need it. Same goes for a magazine for my autos.