Perhaps, but not necessarily. The rapid pace of development of the new fighter was due to having a digital flyoff between competing designs, with CADM software then filling in the details before any metal was cut or laser printed. These technologies have been in development for decades now, with their integration marking a new phase in industrial engineering. The result is that most of the subsystems in a production version of the fighter can be made to order, not borrowed and kludged together.
Exactly. Huge difference between 1990s development and today.