You can also add Reason 6: Disc rot.No comeback on the cards for most uses. The reason why discs died in the last decade for consumers wasn't just because they couldn't store enough data.
It was because:
1. Typical read/write speeds and particularly access speeds are not very fast.
2. The cost of NAND flash memory per gigabyte cratered. Implementations are usually faster, and easier to rewrite.
3. Not just NAND, high density hard drives cost per gigabyte fell considerably
4. The cost went down and availability of high speed internet went up. A lot. This also applies to cellular networks. 5GB of monthly 3G data fifteen years ago was not cheap. Unlimited 4/5G data today is relatively cheap, in many developed countries.
3 and 4 led to 5:
Cheap, widely available and mass acceptance of reliable cloud storage.
Most storage and distribution problems are solved better by one or a mixture of the above technologies for most people in their everyday lives.
As an afterthought you can also point to compression software and decompression hardware for video improving which also eases high quality media distribution. A two hour HEVC 1080p movie looks and sounds pretty darn good at a 5GB file size.
Good enough for you, the hardcore enthusiast? No, but good enough for the 98 percent.
When music CDs came out we thought they were more durable than vinyl because, unlike a needle on a record, the optical sensor of a CD player required no physical contact with the medium on order to play the music. Furthermore, we live surrounded by plastic, and most plastic objects last basically forever unless we deliberately destroy them. And so would CDs, right?
Wrong.
Too late, we found that the thin layers in the disc could separate and degrade while sitting on a shelf for weeks or months. At least LPs and cassettes didn't do that. I still have a few original issue Beatles LPs which, despite a few hisses and pops here and there, still play better than the CDs I bought in the late 1990s and early 2000s
Also 7: Something that always bothered me about CDs was the fact that they needed to rapidly spin in order to work. Why? It made no sense for a digital medium. Today, with storage so cheap, there should be NO moving parts in a music system besides the control mechanisms, speaker cones, and peripheral components such as cooling fans
I will never buy a CD again no matter how much it can store.