
So this lag highly depends on individual workflow and type of brushes etc you are using. I can use a canvas of 20kx20k and say this lags a lot. The brush called pen brush lags a lot in it and that too with 170 px size. When I tried the flat water colour brush in clip studio paint with canvas of 4961*7016 it took nearly 1/4 a minute to just appear on canvas. Many suggest the person to lower resolution. If I go to clip studio paint sub reddit and search for lag there are countless posts showing lag for transformation and brush stroke.

Generalised broad statements is not fair. I know it is slow on huge canvases like mentioned here, but your statement makes it sound like it’s not useable at all and slows to a crawl while painting.
