Well it's pretty easy to find a balance if you at least try, you can use widely available, documented and tested open source libs, for most of your (technically

Well it's pretty easy to find a balance if you at least try, you can use widely available, documented and tested open source libs, for most of your (technically hard) problems. and not roll your own there. (Not invented here syndrome?) And you should also leverage the fact that you own 100% of your codebase, to add as much custom stuff and custom business logic where it pertains, but it is not wise to reinvent the wheel (or the engine, or the carburator) in 2021, when everything from, hosts, db, etc, is available at a few clicks... also depends much on what tools you're using/projects are doing, YMMV