I am not a plumber, but sometimes my handyman work has “scope creep” and requires a little plumbing. Such as re-securing a loose toilet and discovering that the shut-off valve doesn’t work.
If possible, I like to use compression fittings in those cases because it’s faster, easier and I don’t have to worry about scorching stuff like a finished wall.
However, all of the plumbers I’ve talked to prefer to sweat joints when given a choice. They claim that it will hold up better in the long run. Since I’ve never seen a compression fitting fail, I’m wondering if they’re right. And if they are, what is the typical failure mode of a compression fitting?