The 737 MAX fleets will be big enough to justify the cost of maintaining a group of pilots that fly the MAX and a group that flies the 737NG. Just as they do now with multiple fleet types. If airlines were trying to just mix 30-40 of these in with the 737NG fleet the economics would break but when you’re talking a fleet of 100+ it starts working out. Of course it will end up making the economics worse than originally planned for but at this point what can you do? The A320NEO order book is filled for years so if you’re an airline CEO you’re stuck with the MAX.
As far as the airlines go none of them seem to be suffering significant financial damage yet. The pace of orders meant they were only going to have about 30-40 of these things by years end so they’re coping. It remains to be seen how it will affect them long term. DAL seems to have struck gold with the whole ordeal. As the only major US airline without the MAX they’ve increased capacity 2-3% more than planned and their recent Q2 shows it’s working out great.
I did not know this! Thanks for the added insight.