BTW. You can AMA about the technology here.
and temporal: https://github.com/temporalio/temporal
I can't find an easy way to explain everything it does, but it pretty much allows you to write naive functions with no error handling, with month-long sleeps, auto-retries on unreliable function calls, etc etc.
It also gives you a web interface when you can inspect the running functions, and allows for external code (and other workflow functions) to signal/query the running workflows.
This is more of a proof of concept but it can also support DSLs (although we found the go client is easier to understand than DSLs): https://github.com/checkr/states-language-cadence
