Considering that the OP's questions was
"audiophile format of choice in 20 years" it will clearly be vinyl because...
- It's the original popular format for the delivery of hi fidelity music
- Its collector factor in 20 years will be greater
- It's nearly indestructible if properly cared for
- It is housed in a nice package with pretty artwork on it
- It can be displayed stating "I'm an Audiophool"
(tell me how you do that with a high res digital file or stream?)
- It will always have it's "cool" factor.
)
I wouldn't count on it, but hey, anything is possible. Here are a few things that are pretty certain. In 2030 we will have 20 more years of music, at least 99% of which will not be on lp. That means that the lp will be even more of a niche market for the youth of 2030, with 99% or more of all the music released in the previous 45 years having never been pressed lp. Unless, of course, someone starts building new cutting lathes and the like and greatly increases production of lps, since most of the existing lathes and associated manufacturing equipment will be 65 to 75 years old in 2030.
Will the collector factor be greater, or less in 20 years? Collectibles can go up, and they can go down. Look at comic books. Look at baseball cards. As the boomers age,retire, and pass on who will want to buy their classic rock, their modern jazz, their classical collections on vinyl? That is an open question.
The lp, indestructible? OK, if properly cared for. Though the lp revival is kind of sowing the seeds of its own destruction with hundreds of thousands of newbies who do not know how to care for their lps buying them up and wrecking on on cheap tables or old, worn out carts.
The cool factor. Now this is a wild card. 20 years ago, cds were pretty cool. Where are they now? 20 years from now, the lp may seem as old fashioned and archaic to the 20 somethings of tomorrow as the wax cylinder. For all we know, in 20 years the cd may be the retro cool thing to have.