With plenty of parts already NLA or becoming NLA, of course theres reason to worry.
However, we can take part is the re-introduction of NLA parts.
The Classic Parts Feedback Form. Enter part numbers description, etc.
Porsche recently re-introduced the early 944/924 Dashes, for example. I spent two years entering the dash part number on a regular basis. I do this regularly for a number of NLA parts.
They do listen.
https://www.porsche.com/usa/accessoriesandservices/classic/genuineparts/notesonavailability/