SACD and DVD-A didn't catch on for two main reasons:
1. To the vast majority of people they brought no advantages in sound quality.
2. They came out at a time when the idea of digital music distributed via a physical disk was on it's way to becoming obsolete because of advances in broadband speeds and hard disk sizes.
Point 2 is also why CD is on it's way out. It only really made sense when transmitting 700Mb of data by other means was unfeasable. These days what's the point?
That's possibly why vinyl is making a comeback. If people want to have their music in a 'tangible' form then vinyl is the obvious choice. Issues like robustness and portability don't come into it, you have MP3s for that.
Despite what many audiophiles might like to think I really doubt that sound quality or the quality of the mastering come into it. Ask Joe Public about the "loudness war" in CDs or quality of mastering and they wouldn't know what you were on about.
I'd pretty much go along with this, that and the fact that SACD and DVD-A didn't get anywhere near the same push in terms that CD got from the record companies. There was no CD format war either, which eased CD's way into the mainstream.
Irrespective of the vinyl v CD quality debate. in the mid 80s it was pretty irrelevant to Joe Public. It wasn't until CD players and CDs became reasonably affordable that LP finally got kicked into touch sales wise. For the average listener CD played on a cheapish CD player had and has clear advantages over LPs played on a cheap turntable. Chiefly a lack of ticks and pops - so what if a better deck helps this fact - they didn't care to buy a better deck. This and remote control were the perceived benefits and the only ones that really mattered. LP was helped along its way to a minority pursuit by the frankly shoddy product a lot of record companies were pushing out on vinyl by the late 80s (quite possibly deliberately), and also the perception then of CD as a high tech life style choice.
Get to the now and DVD-A/SACD addresses no issues that the majority of people perceive CD to have but downloads for the many do, whichis why one of the most popular music sources is iPod/MP3 player - a format incapable of taking advantage of any possible benefit the hi res formats could give.
In other words while CD addressed real issues a lot of customers perceived LP to have. Same with DVD Videos v VHS, real perceived benefits. The Hi Res formats address no real issues that most customers perceive CD to have. So why would anyone buy them?
For those people who want to own a physical thing, the vinyl is a much better proposition than a CD - they are undoubtedly nicer to own, especially if its coupled with a download as well, thus addressing all the customers needs, without needing to copy the vinyl.
The loudness war is a damnable thing, but the witterings of the audiophile few irrelevant to the market to a large extent. It was never really about sound quality, other than in the gross ticks and pops sense, not then and not now.
I like vinyl because I like records, don't mind the odd tick or pop, find it more listenable for long periods of time, actually like getting up every 15 to 20 minutes and am allergic to remote control. It can also sound pretty damned good

. For me CD doesn't really have any advantage, but I recognise I'm very much in a minority and why. Its good to see that the minority seems to be growing though.
I wouldn't kid myself that its because vinyl is perceived to be better quality in any audiophile sense by the general public - if you read what people say if they state a preference for it sound wise its because its "warmer" - certainly no audiophile stuff about soundstaging or whatever - even if it is true

. It is a "good thing" though, I think.