Local first isn’t limited to web apps. It’s a style of application development in which you locally store and operate on the data rather than fetching it from a cloud backend every time. For native apps that means a local database or individual files on the file system.

> phoning home, telemetry, and other privacy violations; forced upgrades; closed source, etc.

This describes proprietary software developed by capitalist companies. This has nothing to do with local first.