it's not a hack though. i prefer 2x4k. i hate the curve (no straight lines) and UW is too wide to be comfortable (eye and neck angle). 2x4k, one straight on and one angled is ideal. i spent 2 weeks and spent $8000 on monitors to test this out. 34UW at normal desk distance is perfect, however 2x4k is better overall. I actually use 3, as I use the macbook screen as the 3rd.

that said, i have no issue with your choice. for some applications (eg video editing is the default choice for ads of UW monitors) it is really better.

i do have issue with you denigrating 2 monitors. it is not at all "an old hack".