Just about anything beats tape/reel when it comes to durability.
No.. An archive is just that. It's a place for non-transient information, so you would def want it to be permanent. You're correct.True but if you want it to be an archive would you want it to be rewrite able? Personally I would want it to stay the same without fear of corruption of any kind .... guess it's' just a matter of your personal taste ....
It looks like Microsoft is using a piece of fused quartz for storage. Fused Quartz is a type of glass used in the electrical production industry. It can withstand high temperatures and makes a great insulator. It has a higher breaking point than fused silica, because of the crystalline structure of quartz. Fused quartz is used to make microscope slide, disks and covers. For technical details see attached.Glass has one bad quality. It can break (I.e. Stored in an earthquake zone??? Clumsy handler...).
If tape/reel ever broke, you splice it back together and lose a second or two.
If glass breaks, well, get the broom, dustpan and wastebasket out.
I understand quality on glass lasts longer than tape, but maybe a clear PLASTIC would be an even more durable option than GLASS (if possible). Plastic probably costs less to produce too.