This is at least apparent for what Iβm observing in my country on the Southern tip of Africa. The reason seems to be that VarAC provides most of the functions that JS8Call already provides, and then provides a lot of usability improvements as well as transmitting images, documents, faster speed, VMails, etc.
Iβve been getting up to speed with it the last two days, and am really enjoying using it. Iβve documenting what it is about, how it compares with JS8Call, and some tips Iβve been learning, at the web page Iβve linked to in this post.
See https://gadgeteer.co.za/hamradio/varac-p2p-digital-mode-chatting-application/