It's still saving probably a single byte in this example .a { color: red } .b { color: red } Also it saves on parsing time I suppose. And less to zip and un

It's still saving probably a single byte in this example .a { color: red } .b { color: red } Also it saves on parsing time I suppose. And less to zip and unzip. The type of thing I'd add to a projects deployment stage and never touch again unless it causes an issue.