Dave, I want to switch gears a little bit while we have you and note that you have two big developments in two very different parts of the ETF space that could lead to a flood of new products this year. Um, share classes and crypto. Talk me through it.>> Yeah, well, we'll start with share classes because that happened today. We've got 70 odd mutual fund providers who have been asking the SEC to allow them to make ETF share classes of their traditional old school mutual funds. Dimensional got the first appro ...