I can only concur with everything that has been said already. Atlantis' terrible illness will leave a huge hole among us exjws.
We all called him "Grandpa", too. Like everyone's favorite grandpa he was always there for others. Always available to help in any way he could with that sense of humility, warmth and fun that we all knew, loved and will miss so dearly.
My heartfelt thanks to you our dear Atlantis xxx