In 10 years from now I predict it will be very hard for Boeing to get any new contracts in places like India, Africa in general and other non vassals.
Not only does Airbus exist, but both Russia and China are fielding their own alternatives in the 737 class.

So we are talking about the MC 21 and Comac C919.
Not only are they more or less equal in terms of say fuel efficiency while also being cheaper, but both China and Russia have demonstrated that they will deliver on their maintenance contracts despite complications like sanctions.
And they are less prone to the Boeing issues.

The 2030s will be extremely hard for Boeing.
Given how Boeing has treated their sanctioned customers (like Russia, but they are not the first), if you are a country facing pressure from the US which potentially can become sanctions, would you invest in expensive high end equipment from the US?

Let's take a country like India or Turkey who both are facing threats, pressure and in some cases already sanctions by the US. Why would they buy Boeings for their national airliners from 2030 onwards? (replacing a fleet takes time and costs a lot, but now that Boeing haven't been able to make functioning planes for several years, this need of replacement is growing)