Not THIS airplane. It's "not stable enough", aerodynamically.
It is quite amazing that a small group of people keep repeating this. It will not make it true.
The 737 is stable. It can be hand flown. MCAS does not operate with AP in or flaps extended. The MCAS was only to increase back pressure required near the critical angle (stall) NOT to make the aircraft stable enough to fly.
How many times does this have to be corrected?