Well we don't know for sure but all signs point to yes he has. I'm not even sure why he would if he has because XPTX was doing so well and holding value for a very long time. People just like to see some activity from the dev and to keep the website and block explorer up and running but we don't have any of that right now. The XPTX community on discord is trying to come up with ways to fix the issues but none of us seem to be experienced enough for this.