Many actual pilots would likely disagree. Shoehorning vastly different planes into the same type certificate can be dangerous. Convenient for pilots due to certification and recurrency issues, but not necessarily a good idea.
Do you really want a pilot to jump into a 737MAX who only ever flew the -100? I bet the memory items are very different if not also all the speeds and weights.
I'd argue that a new model of an old plane like the 737MAX would be safer, Lion Air incident notwithstanding.