As others have pointed out, the regex engine is the same so the benefits would trickle downstream. For example, VSCode also uses ripgrep and therefore the rust-lang/regex engine.

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burntsushi 13 hours ago | parent [-]

ripgrep plugged this gap a long time ago by providing PCRE2 support.

	▲	shilangyu 5 hours ago \| parent [-]
		PCRE2 supports only bounded length lookbehinds. It is true, it is not a big improvement to have unbounded ones in rust-lang/regex, but it still feels like something.