IDK, Realistically, the width of your monitor doesn't matter so much, as keeping things reasonably narrow helps with readability and you can look at multiple files side by side. Moreover, multi-line ...

One IDE to rule them all. You won't want to use anything else.

Language evolution will be interesting. The older stuff will remain in circulation in the training dataset, for significant changes the lack of recent training will be a pain. A broad observation here ...