Blu-ray (1×) ~36 Mbit/s
MS-Glass (single beam) ~25.6 Mbit/s
MS-Glass (multi-beam) ~65.9 Mbit/s
That's ~7-18 days per 120mm x 120mm medium (4.8TB).
Glass prices stable for now. Also, the authors make no statement about horizontal vs. vertical storage.10,000 years sounds like a good benchmark and isn't as obviously ridiculous as saying a million years at 260°C
Will it run on Linux ?