The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
It's been shown over and over again that for instance, if you want to generate force in a given muscle and really isolate that, doing the isolation work before a compound movement. So this would be leg extensions the thing where you sit and you extend your toes up toward the ceiling. Leg extensions before squats will allow the squats to target that muscle group more effectively.
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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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If your goal is to be better at those, you want to avoid isolating any one particular muscle.
for strength in general for power or speed or strength we want to select compound movements
well if you want to get the most out of your regional growth it's probably good to mix it up