Much more important than any particular tool/methodology/technique is how well a particular person understands and uses/implements these.
It doesn't matter nearly as much if they are doing X vs. Y. The important question is: are they doing X well or in a half-ass manner? Are they trying to do X because it's the hip new thing, but they don't really understand X in any deep way? Do they energetically talk the talk, while they hobble the walk?
The two questions at the heart of the matter: do they get stuff done while using X? How much technical debt do they incur while getting stuff done using X?
It doesn't matter nearly as much if they are doing X vs. Y. The important question is: are they doing X well or in a half-ass manner? Are they trying to do X because it's the hip new thing, but they don't really understand X in any deep way? Do they energetically talk the talk, while they hobble the walk?
The two questions at the heart of the matter: do they get stuff done while using X? How much technical debt do they incur while getting stuff done using X?