About the only downside to optical is potential for “laser rot” which I have no experienced in several years (over a decade).
Ultimately physical media is dead. It would be great if studios went the way of the music industry - you can stream, and if you want to purchase a copy and download it and play it anywhere (FLAC, MP3, WAV, ALAC, DSD, etc…) you can. This is what convinced me to stop purchasing physical CDs though I still purchase physical SACD, Bluray Audio, DVD-A when no such HD audio alternative exists to download.
For video, we need the same: let us purchase and store our 4K movies if we choose to. And let it have HD Audio and not the compressed Dolby Digital/Atmos (any streaming Atmos is not lossless). The MPAA is always behind the times; the RIAA finally got it.
Unfortunately it’s all about control. How long before Disney starts to put their streaming content into the “vault” as they did with physical, to build up demand? How long before they start charging a premium for “new”, “special” versions or popular titles? Once you cede all ability to control your own media consumption with no other choice, you are screwed. Same is happening to video games albeit slower pace.
Once we are all streaming only across all types of media, the ISPs are going to make a crap load of more money selling you on consumption based plans. Might think about investing in that stock now