I don't know worldwide counts, but the Pharo discord currently has 2875 members if that helps.

��������������������� Original Message ���������������������
On Tuesday, July 27th, 2021 at 10:09 AM, <horrido.hobbies@gmail.com> wrote:

I���m guessing between 10 and 20 thousand. I���m guessing a few thousand for each of GemStone/S, Pharo, Squeak, VAST, and VisualWorks. I���m guessing a few hundred for each of Amber, Cuis, Dolphin, and GNU.