Same here. Haven't had a single Unicode bug in production since we switched to Python 3. Also, chained exceptions (extremely valuable in walled-off production

Same here. Haven't had a single Unicode bug in production since we switched to Python 3. Also, chained exceptions (extremely valuable in walled-off production environment). Type annotations actually work and have prevented a number of bugs. The asyncio syntax is really nice with Tornado (don't use aiohtto, use Tornado! it's much more mature)