The context in that article is doing advanced / study level aircraft, not basic aircraft included in the sim. Microsobo will not take planes to any advanced level. That’s for 3rd parties. Microsobo have been pretty clear on their stance on that for months now through various Q&A sessions.
What Breezewind is asking is about fixing the sorely lacking PD edition planes that aren’t even up to the already rudimentary standards of the Standard Edition planes, not about creating study level aircraft out of them.
Unlike the standard planes which there are a lot of mods to fix basic broken ■■■■, we can’t do that with the DRM locked PD planes.