Yeah, I mean, if I look at the trashy apps I currently have running, they all do have deep lock-in that makes the reverse-engineered clones impractical or impos

Yeah, I mean, if I look at the trashy apps I currently have running, they all do have deep lock-in that makes the reverse-engineered clones impractical or impossible: Teams, Discord, Slack, the Windows RDP app. If I look at the Activity Manager in macOS, of apps that are less trashy but currently taking up a lot of memory, they mostly aren't apps that I'm willing/able to move away from to save on resource use: Firefox, Safari, 1Password. (For browsers, you can blame poorly optimized websites for a lot of it, but I just don't see anyone rushing to create lightweight clones of websites in order to save users' RAM.)