Hynek's talk is long but relevant all the way through. The headlines:
1. All sneks are good (there are lots of ways to write Python and they are all fine)
2. Options have costs (saying yes to everything is a failure of leadership)
3. Expand the gradient (lets open our minds to other ways of building applications)
If you have a fediverse account, you can quote this note from your own instance. Search https://hachyderm.io/users/nedbat/statuses/115260122502480601 on your instance and quote it. (Note that quoting is not supported in Mastodon.)