For some reason I'm having a hard tine explaining, Byrne's reinterpretation lost the "heart" of Superman for me. Didn't always agree with some of his changes. Many new fans enjoyed Byrne's take on the Man of Steel, but it just wasn't the same, and many readers didn't know what stories still were canon and which parts were to be ignored. For me, Superman was always part of the founding of the Justice League, not just an emergency member during the time of Legends. Would have loved to seen Superman deal with the death of Supergirl longer with more lasting consequences to him, before her non-existence.
-jthree