Originally Posted by Hotel Kilo

Not really Joe. Both airbus and boeing, rather than designing something totally new, went with old designs and tweaked them a bit. Examples of "new" designs - 787, 330, 350, A220. Don't get lost in what is a new design, and what is a "new" airplane".

Don't look at certifications either, the FAA and EASA are going to demand that any "change" to an aircraft be tested and certified. That's just how they CYA. MAX 10 and 7 should be flying right now. They are basically the same as the 8/9. Yet, here we are. I could write a book about it, but not going to do that on a forum.