With Linux becoming more and more a gaming reality, a mod manager on Linux is not an afterthought anymore. Especially with Valve's increased focus on Linux. I have been gaming on Linux for years, I haven't had any Windows machines running since 2016. I have seen the world of Linux gaming changing rapidly. From lots of tinkering to get games working to just clicking 'run with Proton', install, and play. So yeah, a native mod manager would be great. I also understand the magnitude of the undertaking. So patience is probably the best policy.