I mean, your first post about it made it seem like you were upset because of the idea that nobody plays Another Eden, which isn't actually the case. I totally get wanting a prettier remaster, it would be amazing to have a complete Chrono package that's truly HD, but there's a huge difference between making a single CG advertisement and redoing an entire 20-40-hour RPG, you know?
It's not dev laziness, though. Not keeping source code or assets isn't something exclusive to Square, and it doesn't mean they're lazy or incompetent; it was an entirely normal practice back when these games were developed. For example,
here's a clip of a few people talking about it in the context of Konami (and Japanese devs in general).
Western devs have had problems with it too, like with the
Mass Effect and
Baldur's Gate (#2 under what went wrong) remasters. Same with the 2016
Ratchet and Clank game (#2 under what went wrong there as well). It's just a
common thing. Nothing to do with laziness or incompetence or anything like that, not an excuse. Times were different then, digital storage was nearly all physical (cloud storage didn't really get big until, like, 2006ish or so?), and the industry as a whole didn't really expect remasters to be a thing, let alone that they'd need the source code for anything else, especially with how development was so different for each console.
Long story short, the industry had no idea what its future would be, and game archiving/preservation is still barely getting off the ground nowadays, let alone back then.