I use private trackers exclusively for content I want to "own" or want in the highest possible quality. Stremio/RD is great though for my wife to be able to search new media and potentially stream in okay quality without fucking with sonarr. Or popular TV you're maybe not sold on but would try an episode. Or for old SD content, like tossing on a 90s show for a few episodes. To be honest, I live in a world of ad block and Stremio is sometimes the only way I even know something is out...
Anyway, they complement each other well.
I agree. I have become more amenable to things like Flatpak or Podman/Docker to keep the base system from being cluttered up with weird dependencies, but for the most part it doesn't seem like there's a huge upside to going full atomic if you're already comfortable.