so much the

so much the better

That is even better. I love your sister, so if she can come too, then so much the better.
See also: better, much

so much the worse

That is even worse. If their policy ends up crippling the working class, then so much the worse for their chances at remaining in power after the next elections.
See also: much, worse

so much the

To that extent or degree, as in You decided to stay home? So much the better, for now we won't need a second car. This usage is always followed by a comparative adjective, such as better in the example. [Early 1200s]
See also: much