Keep using the stuff I have. If you can use a soldering iron, a stereo system's service life is basically forever. Home theater is different because of video standards, but it doesn't seem like 4K and HDMI are going away anytime soon. I need a component input for my PS2 and Wii, so having slightly older hardware actually works out nicely.
And, to be fair, not all new stereo equipment is malware-infested trash. I'm sure there are plenty of new receivers that quietly go about their job - but not from Samsung subsidiaries, apparently.
Now if only the Logitech Harmony remotes would come back.