I can understand if they have a shortage of something like carbon fiber they can't stop production. However, in my opinion it would be great if they were transparent with those issues and gave those of us affected the opportunity to make a different selection rather than being held up. For example I have a perf with carbon fiber interior. If I were told that there is a shortage that could delay my car I would gladly switch to Obeche in order to avoid the delay.
I think much of the time these parts delays aren't expected until the supplier suddenly cries uncle at the last minute. At that point everyone changing their locked-in configurations at the last minute would throw the production logistics into an even worse mess.