Thanks for all your comments!
Yes, 20k s2s points, all CW (no QRO) has been my 3rd and last self-defined SOTA milestone (after Mountain Goat and the 12m Challenge).
BTW, The score for All Modes does include 11 points for my one and only s2s QSO in SSB, performed on 25.03.2014 with Guido HB9TNF/P.
SOTA has become something of a routine activity for me in the last six years, so it seems to me that this last achievement would be a good opportunity for a change to pursue other (knee-friendlyer) activities again. That's why I want to say thank you and goodbye to all SOTA enthusiasts - many good experiences and some new friendships won will stay with me. Maybe I'll miss Elliott's wonderfully humorous comments a little bit, hi.
Of course, I would have liked to take the Turquoise, but the defined point levels are somewhat very unrealistic, so unfortunately no happy end in this regard, hi.
73 gl, Heinz HB9BCB
The screenshots below were taken on 11/11/2017