I think they couldn’t get it to a place where it could be small enough to be useful?
Hopefully when Apple ships AR hardware for real it’ll be what it should be. Magic leap will be kind of like General Magic or the creative nomad jukebox - right idea but too early with hardware and not a great product.
Their constant advertising with no details for years really bothered me though so I probably have an unfairly negative perception of them.
Either build what you’re doing in public like Facebook/Oculus or do it in secret like Apple, but don’t loudly advertise in public when you don’t have anything to show for it.
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(I played with the magic leap hardware that shipped for an hour or so and found it disappointing, a lot less interesting than when I had played with VR hardware for the first time. I think AR as the next computing platform has huge potential, but the hardware isn’t there yet and it needs a strong platform/ecosystem behind it. I think Apple has been preparing this for years.)