I totally, 100%, agree with you.
Honestly though, if I’d never played this sim before and was presented with the 737 (the most complex and detailed aircraft available) I’d have been blown away by the performance. I don’t understand how it can be so smooth, yet a GA aircraft stutters along like nobodies business.
There are clearly issues with CPU load that go back a long way and got worse after SU9, which makes what PMDG have achieved all the more bonkers.