This is Grimm's latest blog re ranges:

https://www.modernescpp.com/index.php/the-ranges-library-in-c20-design-choices/

In it he also discloses that he has the very serious progressive nerve condition ALS.

He asks that if anyone knows anything about clinical trials or new treatment to contact him as in Germany (where he lives) the only medicament is Riluzol.

I wish to express my best wishes to him and his family.