AFAIK the fact of TOR usage is rather easy to detect. AFAIK (from some news here on HN) you can get SWATed and arrested for a mere suspicion (e.g a false positive by an automated traffic analysis system) of using an end-to-end encrypting messenger or even Twitter in Turkey. I doubt it is legal and safe to use TOR in such countries. We need something that is harder to detect on the client ISP side.