It’s only going to grow in the future, probably to the point where eventually Linux will become the main platform.
I would argue that the only reason we’re even having this conversation is that it seems like a possibility that Linux could become a mainstream gaming platform. Maybe not even likely, but possible- and that’s largely thanks to Valve pushing for platform independence and flexibility.
But yes, obviously there will be problems trying to play an enormous library of games made for Windows on Linux. I still wouldn’t recommend it to a friend building a gaming PC and I bet a large number of people who get a Deck will install Windows the moment they can’t play the new trendy thing. I wouldn’t blame them, I think people should use the software that enables them to accomplish what they want to do.
Last I checked is still the recommended way to install the LetsEncrypt certbot, though these days I tend to have that happen within containers anyway.