For example in the case of Model X Signature, Tesla respected literal priority for perhaps first dozen reservation holders — made a PR stunt of it.
Then came one or two lumps/batches and by the time they were finished with the Signature program, people abroad were getting their Signature cars in after a bunch of regular shipments or at best the same time as regular shipments.
This notion that Tesla would somehow retrofit all Model S/X cars in VIN order no less, and before moving to Model 3, according to some is absurd. That is not a realistic reading (or even a literal reading) of what Tesla’s SC wrote.
Tesla does not operate that way — and they did not mean it that way. (They may have formulated it in a misleading manner to sound good of course, that would fit Tesla’s style, but their crime here would have been merely vagueness... not a lie.)