Krita currently does not support font hinting.
This is most visible at small text sizes with anti-aliasing off - since it doesn’t use the font’s bitmap strikes, things get a bit ugly.
For comparison, GIMP does do font hinting, and the difference is quite stark:
These are both the same exact font from my computer. The difference is entirely down to the software’s hinting support or lack thereof.
As a pixel artist, ‘small text sizes with anti-aliasing off’ is in fact my main use case for a text tool, so this is relatively important to me.
Thank you for reading, I hope this can be implemented :)