I would define “succeed” as continued and stable independent operation in 2023.

It will be extraordinarily costly to make captains want to stay at a regional when the whole industry is hiring at Vne.

It will be extraordinarily costly and complicated to bring the regional fleet in house along with the pilots, fa’s, mechanics and ground crew.

It will be extraordinarily difficult to run an airline with greatly reduced regional lift.

My personal favorite wildcard scenario is massive domestic widebody deployment to support upgauging the entire operation.

It’s easy to shoot “these are the 16 reasons they would never” holes in every scenario. But IF the regionals have to contract, something weird has to happen in response.