I work on a Quest 3 no problem. This is sharper.

For me personally the Quest 3 is absolutely unusable for any text work. Even small font in games looks shitty. This is so far off for what it ought to be for comfortable work that I'll wait for devices with at least double the resolution per axis, i.e. 4x the pixels of the Quest 3 screens to even bother trying again.

Edit: And I'm writing this on a 32" 2560x1440 display which looks just dandy to me, so it's not like I'm super sensitive or have above average eyesight (quite the opposite actually)

I have tried this in the past and it wasn’t nearly sharp enough but I guess I see people using 1080p screens at work and those make me want to rip my eyeballs out.

Honestly I'be tried Quest 3 and it was not enough for me to consider it anything more than just a toy.

How many hours a day you spend in it? How often do you use it?

Most days often for several hours.