Yup, this is a typical “modern” way to get terminals over serial connections. For instance, my home server is headless, but I can use its onboard serial connect

Yup, this is a typical “modern” way to get terminals over serial connections. For instance, my home server is headless, but I can use its onboard serial connection (via GNU screen) to manage it “remotely” even if, for whatever reason, it’s not connected to the network itself, SSH isn’t running, or similar.