Vox, I echo your sentiments, if not experience. I have two uses for optical disks...
One, we have (no kidding) ten thousand DVDs, just about every classic film we can find, plus occasional from-TV recordings for classics that aren't available. We buy from around the world, always in search of "finally finishing our collection of movies". Which obviously won't end.
BluRays barely address a few hundred of our classic films. "Why bother? They can't remaster video-quality much beyond what's there..."
The so-called bonus features can often be revisionist histories, too, almost never include still-living principals, and certainly don't benefit those folks who probably could use the money. Why should I support rip-off studios? They offend me.
Two, data backups. BluRays hold more and would be a smaller collection of archives to maintain, but the HD-BluRay battle was a clear reminder that "new tech is coming and old tech will be useless."
CD seems to be solid and "compatible". DVD seems to be holding this. Any assurance that BluRay in 2030 will still be readable?
"No more than CD or DVD."
We have hard-drive storage systems that are far more portable and quicker to bcakup, restore and migrate. Our archival needs therefore are lessoned by this technology.
Your question remains, and I know it by heart.
If BD blanks were priced at a reasonable value, then I'd still question "immediate and future compatibility".