Not updating to Python 3 eventually is not really an option, IMO. It must happen. It's only a matter of when and that clock is already ticking. I suspect when the OS's ship Python 3 by default it will be unavoidable, but it'd be nice if we gave ourselves a head start. To put that into perspective, Canonical reports their Python 3 priorities at https://wiki.ubuntu.com/Python and on windows, you must be running Python 3 to take advantage of the modern visual studio toolchain (https://www.visualstudio.com/vs/python/). Who knows what's happening on macOS, but you can safely bet that a future release will abruptly and without warning switch to Python 3 as the default version. Lack of support for python 3 has already made our own efforts on windows more difficult.