Page 4 already? Time for another. This supposed shidduch crisis is very confined to a lone demographic. So even assuming that the reason for the crisis is a shortage within the community, why wouldn’t the extras spill over and be absorbed into the next closest in ideals community? Certainly a shortage of prospects is a good reason to broaden one’s search. If you are thinking because of refusal to compromise on frumkeit, let me point out that frumkeit is a sliding scale, with ideologies varying slightly from person to person even within each community, and certainly the end of the spectrum of one commjnity lines up closely enough to the top of the spectrum in the next. The shortage would thin itself out as the spillover was shared through multiple communities and probably would resolve itself naturally. Unless there is such an enormous gap between the spectrums that no mobility is possible.
If that were the case, I’d be more worried about the ideals gap than anything else. Because if somehow a retaining wall is holding everyone in the same spot, against the natural tendency for people to be varied and complex, then I would bet dollars to donuts that the shidduch crisis far from the only crisis that this community is facing.