Good info here from @erik_squires
Only two things I would add to it:
- The ESR-as-part-of-the-design consideration is most likely to create an issue when a person decides to replace electrolytics with film caps, which have low ESR. As long as you replace same with same you should be OK
- If you’re going to get a Dayton Audio DATS, you’re likely to get the best price from Parts Express since Parts Express owns Dayton Audio
Personally I lean more to the side of leaving well enough alone when appropriate, which is when the factory used high quality components, and those components still test well within spec (of course you always test caps out of circuit). A crossover is not like a Class A amp in which caps are literally being baked to a crisp.