[Chicken-hackers] Egg plan for 5?

[Dan Leslie]

My apologies if this has been discussed and I've simply missed it when
searching the archive, but I'm curious what plans are in place for
upgrading eggs to Chicken 5?

I expect Chicken 5 is tossing backwards compatibility to the wind
wherever it makes sense, being a major version release, and so I wonder
what I must undertake as an Egg maintainer to prepare for the upgrade.

Thanks,
-Dan