This seems to be intended as a tree of achievements gained in the process of developing web, rather than a guide for what to use for any particular instance. Se

This seems to be intended as a tree of achievements gained in the process of developing web, rather than a guide for what to use for any particular instance. Several of the paths I have happily skipped. The backend could be further broken down into separate parts, each potentially using a different language, in order to give a clearer picture of the options and complexity. 1) web server (request/response), 2) search 3) database/store/access 4) data pipeline/ETL 5) payments