I’ll concede that “most innovative” is a bold claim. But here’s why I believe it:
Lark lets you switch between 3 parsing algorithms with the same grammar (Earley, LALR, CYK)
It includes unique algorithms that I invented (afaik), like a contextual-lexer for LALR, and a dynamic lexer for Earley.
It constructs a usable parse-tree without any additional code, only the grammar.
It can generate a stand-alone parser.
And there many more tiny details, which few if any other parsing libraries offer.