Hello Guy
I presume you mean “airports” when you write “towns?” I’ve not seen many towns on plateaus but I’ve seen a lot of airports on plateaus.
Maybe this article will help explain the reasons for the undesired effect and how it can be fixed.
Once Oceania, Greenland, Russia, and Antarctica are complete the intention is to shift focus to the production of ATAPs. However, if it becomes known that the next-generation P3D and DTGFS will not have the flat-airport limitation, I presume most of the user base will move to those platforms, so future production priorities are likely to look forward instead of back.
Let me know if you have other questions.
Thanks
Justin