The needed evolution of videoconferencing

Disclosure: Many of the vendors mentioned are clients of the author.I’ve been covering videoconferencing long enough to watch three significant efforts in the 1980s, ‘90s, and 2000s fail spectacularly for pretty much the same two reasons: proprietary hardware and software and too little interoperability.  You wouldn’t buy a cell phone from that only connected to another phone from the same vendor, right?  Yet, it is not unusual for the hardware and software from one