For me the low DPI vs. high DPI displays didn't make a difference. I've been using proportional fonts ever since the days of very low DPI displays and still lik

For me the low DPI vs. high DPI displays didn't make a difference. I've been using proportional fonts ever since the days of very low DPI displays and still like them now that I only use high DPI displays. The key to using proportional fonts is to stop using column alignment and use only indentation instead. There's an illustration of this in the rustfmt code I posted elsewhere in this thread. And you're right, once you abandon column alignment, there's no longer any reason to prefer spaces over tabs, so you can take advantage of the other benefits of tabs.