If your library is on other platform like gog, epic, amazon or off platform .exe you can use heroic launcher and for most stuff it works just as well.

For some games there is a little more learning curve because you have to translate custom steam configurations found on protondb to do the same thing in heroic but overall you actually have way more control then steam.

The only reason “id think twice” is if you play lots of games with anticheat which does not work on every distro (like arch btw).