Indeed - but it runs really well through Proton, as does BL2, so no big deal.
Horizon Zero Dawn runs perfectly through Proton as well. Currently playing Forbidden West, about 24 hours in, and have encountered some minor issues (occasional momentary graphical glitches, rare instances of dialog drops requiring exit to title screen), but I’m not complaining.
If you’re using Debian as a daily driver you can always use a Flatpak if you need a newer version than what’s available in the repos. The foundation is solid, though, and that’s what matters - it’s one of the things that keeps bringing me back to Debian for office workstation use.