You only cannot get sharp internal corners. External corners can be square/arbitrarily sharp. I don't think it's too big of a problem, usually you want things r

You only cannot get sharp internal corners. External corners can be square/arbitrarily sharp. I don't think it's too big of a problem, usually you want things rounded to relieve stresses anyway, but indeed I can see situations such as aesthetics or piece compatibility this could be an issue.