[Bongle]

The key thing about this year is that it is all about developing a point differential with the rest of the regional. A coopertition stack or set develops slightly less of a differential than getting those 20 or 40 points conventionally. For an extreme example, think of a 6-robot regional: it is clear that a coop set or stack is useless at a 6-bot regional, since it would net you zero point differential above the rest of the field.

Coopertition stack: On average, gets you 30ish points ahead of the rest of the field, depending on the size of the regional/district/division. The value improves the larger the competition is, since it means you're sharing it with a smaller fraction of the field.

Acting in your team's interest: If you can get your alliance 30ish points in the time spent doing a coopertition stack, then you should do that instead.

A coop stack will require:
-Carry and drop off at least 1 yellow bin onto the step
-Wait for the other team to drop 2-3 yellow bins on the bin you supplied

That's a whole lot of robot-seconds spent for a 30ish point differential on everybody else.