Yes. 2x worked perfect for me at 4k, and its the default for hidpi settings I think. When I switched to 1080p I had to manually increase font sizes (not overall scaling) because the default size wasnt sharp/readable enough. Its pretty cool 4k now works so well out-of-box on Linux. It was nightmare in 2015.
In my opinion 3200x1800 at 13.3" is more than enough already (I own one) but I guess marketing wanted more.