Today it turns out Apple not only proposed but implemented and shipped the actual feature last year. "It could be an interesting opportunity to reboot a few long-lost dreams". "I kind of get both sides here". "I guess I personally come down to leaving this turned on in Safari for now, and seeing what happens". Granted, the overall sentiment is still negative but the difference in tone is stark. The reality distortion field is alive and well, folks.
With Apple, it's the opposite. Freedom to install third party app? That would be dangerous! Freedom to use iMessage in the browser? That just doesn't make sense! Freedom to use third-party browsers on iOS? I guess most people just don't care about that one.
It's just striking that for every other company, lock-in is bad. But for Apple, lock-in is actively evangelized by the user base.