With a quality IDE for new new AmigaOS it might be easier to port/develop applications for it. No?
Port: Certainly not.
Develop: IDE can't write the program for you, so not really.
The real problem for any amigalike OS is the lack of market. No serious software house will ever even consider doing any work for these platforms unless if the potential market is at least several magnitudes larger.
Having quality IDE will not fix this.
It's a hobby. It's time to accept this.