Is the product released.
Or still in vaporware stage?
It is not released, but I saw many screenshots of their pre-release, and they are clearly working on it - So there is no need to doubt or worry about development, its all authentic and genuine.
Hence, I am Fairly confident it will be released when it is stable enough ( functionality wise and also bugs and usability wise )
Besides Roman is a very decent and skilled person, also their CTO Aleksey is also well known and credible int he circles.
I do agree their communication pattern, and operating norms are a bit different from how we do it here in the west. They don't come out and shout on every single sitting and standing. So we will have to accept their way, which is usually long pauses where silent hard work goes on, followed by authentic updates.
btw, here is a nice pbx pre-release screenshot I found :

You can have a look at other images on their Instagram here :
https://www.instagram.com/encryptotel/