I think the real importance of the cassette was that for the first time it gave the consumer some control over the music. You could create mix tapes from the records you owned and best of all you could dub records you didn't. Which is why the cassette is completely obsolete today when digital music is far better suited to those ends.
You missed the point: with downloads the ordering is immaterial, since you decide the ordering. The secondary point, which you also missed in your eagerness to prove you understand the world, is that a download is trivially fixable: it's one quick copy of a file or a directory on a web server, and immediately everyone who wants to buy the music will obtain the corrected files.
Don't dismiss the new just because you grew up with the old.
As to the autographing: that's a new argument that no one in this thread had so far made, but sure, I guess? I have also never understood the mysterious draw of the autograph, but I understand there are those who do. I'm keen to hear what percentage of releases owned by the collective CD-or-bust crowd are autographed.
And felser: SOMEone has to come down and scream at the top of their lungs in this forum every now and then, because otherwise it's just a recording of an echo chamber filled with 70 year old men. And not even a download of a recording. Some sort of weird old "CD" thing. What gives?