Of you need fractional scaling, they are unusable blurry. Some screens just need fractional scaling so for those setups it’s almost essential to do this.
You need fractional scaling it your resolution is very high compared to the screen size. So something like a 15 inch 1440p screen would need 150% or 125% scaling because 100% is too small, 200% is too large but with anything in between, xwayland apps are blurry af.