After installing VSCodium, you must manually disable telemetry in your settings file to stop it from sending tracking data to Microsoft.
https://github.com/VSCodium/vscodium#getting-all-the-telemet...
https://github.com/VSCodium/vscodium#getting-all-the-telemet...
The instructions here and here help with disabling telemetry.
There are no strict limits on paranoia... Maybe Satya Nadella threatened to literally murder everyone involved with VSCodium.
[1]https://github.com/flathub/com.visualstudio.code.oss/issues/...