I run proprietary Nvidia drivers as well and Wayland runs so much better than Xorg now that I'm permanently coming over to Wayland. I'm extremely happy rn with Wayland
So this here I think is the best monitor orientation for software development. It provides the longest line lengths and no longer need to worry about that pesky 80 column limit.
Somewhere in Xorg, there exists a patch that fixes vertical sync so that glxgears could be displayed by printing out every individual frame. And honestly, that's one of the main reasons to love linux ecosystem - because things are not done out of necessity, it facilitates the development of most flexible software with least assumptions and most freedom in how you can use it.