I mean isn't that the whole python argument for Semantic-Whitespace-As-Grouping?

No the argument is different, but using indentation to determine block nesting does allow multiple closure of blocks, as a side effect. Python invented mixed solution when there is an opening bracket (usually ":") and there is no closing bracket -- instead the change in indent is used as the proxy for the presence the closing bracket.

The problem is that it breaks too many other things, so here the question "whether it worth it" would be more appropriate, then in the case of soft semicolons or "reverse labels on "}" like "}LABEL" .