Awesome write-up! I did go exactly through the same changes. I also write about it more from the business intelligence angle: https://medium.com/hackernoon/data-engineering-the-future-of-data-warehousing-81bc953a9b00

And I also wrote about Building a Data Engineering Project in 20 Minutes in case you are interested: https://sspaeti.medium.com/building-a-data-engineering-project-in-20-minutes-85c37cad4d87