That is a great question. My lack of technical expertise is going to be fully exposed here. My kindergarten-like understanding is that there's a rotational system that keeps the engines fresh. They don't just sit forever; they do have to move in and out. There is a maintenance program that is required for upkeep, whether or not they are flying and in commercial service.
The planes will be there to use. The MAX is a good example. That was a grounded fleet, but it's now starting to be reintroduced into the market. So I think you could use that as guidance in terms of whether the aircraft will be there. It's a question of all of the other things that might not be there when the economic and health conditions change.