Claus, glad to have found someone who agrees on the Dellchen. It’s been a constant struggle with Cornelius - I try to be as obnoxious as I can by reminding him of the greatness of a Dellchen Riesling Spätlese…
Mikael, what I mean with “ripe acidity” is that acidity can be high, yet feel fresh zappy and invigorating without the piercing sharpness associated with cooler vintages that can sometimes can be translated into an acidity that fels a little “outside” the fruit; not integrated so to speak. For example, when the 2004s from Mosel were released, they felt (to me, after all, it’s just a personal opinion) quite angular with the acidity in one place and the fruit in another. Beside, rather than within. Also, the acidity felt “sharp”, almost piercing and subsequently I didn’t buy many bottles. But then again, it just shows you how much I know about wine, because right NOW, the 2004s are drinking beautifully and are far better than any of the 2005s I have recently opened from the region. In 2021, you again have that vivid acidity that feels like a tuning-fork but it’s a more polished and integrated acidity. Like an initially sharp square that has been somewhat rounded in the corners but still feels very sharp and precise. Difficult to describe - we must share a glass together some day and engage in some serious empirical science. 
Ken, I listened and an appointment with Florian is done, so expect a full-blown report (later) and an extensive highlight of impressions (sooner). Are there any particular wines in his lineup you are more interested in?