If John Lennon were still alive, what would his career look like post 1980?

After Milk and Honey, how many more back and forth albums would he have done with Yoko?

Would The Beatles have reunited in the 80s, and would they record new Beatles albums?

What would John have said about 9/11?

Would George still be alive today too? Think about it, maybe the stress of losing John made him smoke more, so maybe in this alternate timeline, he never develops cancer?

What would John say about politics today? What would he say about Trump?