The whole point of bitmap fonts is that they're designed to be used without anti-aliasing. There's no blur.

Examples:

https://github.com/Tecate/bitmap-fonts

If you're on 4K you can simulate how they look on 1080p with 2x integer nearest neighbor scaling.

Too bad I can't bitmap-font UI elements. Being able to scale those freely (my DE allows it by a float value that is currently around 1,65) without too noticeable blur is my most important reason for a high resolution screen.

The by current standards normal sharpness is nice too (1080 screens aren't really blurry, they're pixely).

But getting vscode or chrome to render fast at 4k is nontrivial.

I basically went back to 1080p because of this.