Your information is a few years outdated. lineageOS neither comes rooted, nor does it offer a native way to root anymore. Magisk became a thing with a whole community around it. It’s an unlocked bootloader hider, root manager (and hider), and a system patcher, all wrapped up in one tool.

With Magisk, you give root access to the apps that need it, hide root ability from apps that require non-root devices (those apps do that by pretending to need root). Also, the Magisk app can rename itself, which is important as some apps check against the name itself.

The future challenge is with Google trying to force hardware identification (Apple style). I have not been following developments regarding that though, since as others mentioned, my X years old phone is still serving me perfectly, and I have no intention to upgrade any time soon.