That's how I use a 4K @ 32" (16:9). It's just on the side of being comfortably usable. If the density were any greater, I would have to use some HighDPI mode and sacrifice real estate.

That's awesome. Would love to try one of these one day, alas I haven't seen them in the flesh yet. I sit pretty close the screens so have been wondering how a large 4k at 100% would work for myself.

In some ways, I imagine the Ultrawides (especially the curved ones) are probably more usable, because quite often you could get by nicely with a purely horizontal array of windows, and not have to be thinking about how to most effectively make use of vertical partitioning too.

When spending the money, I didn't feel like hitching myself to a "weird" aspect ratio, but maybe Ultrawides are here to stay.