When did Prog first "Jump the Shark"?

To begin with for those aren't familiar with the phrase;

From Wikipedia
Jumping the shark is an idiom used to describe the moment in the evolution of a television show when it begins a decline in quality that is beyond recovery. The usage of "jump the shark" has subsequently broadened beyond television, indicating the moment when a brand, design, or creative effort's evolution loses the essential qualities that initially defined its success and declines, ultimately, into irrelevance.

The motivator for me asking is that last weekend I was digging through some old VHS tapes and found my copy of Lisztomania. I hadn't watched it since probably 1985 and had completely forgotten just about everything about it. Well towards the end when Rick Wakeman makes his appearance it became painfully apparent that this was probably the moment. Three full years before the dreaded Love Beach album which, had it not been for Rick's (performance?) involvement in Lisztomania, would have been my first choice.

So what do you think. What's your choice for Prog's Jumping the Shark moment?

Prog hasn't jumped the shark at all - not even close.

Still MID-FLIGHT, baby, and there it's going to stay forever!

Originally posted by irrelevant Originally posted by Aussie-Byrd-Brother Prog hasn't jumped the shark at all - not even close. Still MID-FLIGHT, baby, and there it's going to stay forever! Yep, well said!  There are some prog bands over the time that might have jumped the shark, but not the genre as a whole really.

And right back at you, good Sir!

I should have also said it was at it's highest altitude too!

Originally posted by Progosopher Originally posted by irrelevant Originally posted by Aussie-Byrd-Brother Prog hasn't jumped the shark at all - not even close. Still MID-FLIGHT, baby, and there it's going to stay forever! Yep, well said!  There are some prog bands over the time that might have jumped the shark, but not the genre as a whole really.  Well said,both of you.

Originally posted by The Mystical Originally posted by Progosopher Originally posted by irrelevant Originally posted by Aussie-Byrd-Brother Prog hasn't jumped the shark at all - not even close. Still MID-FLIGHT, baby, and there it's going to stay forever! Yep, well said!  There are some prog bands over the time that might have jumped the shark, but not the genre as a whole really.  Well said,both of you. Well said all of you.

Never truly, but of course I'm biased (as are most here, naturally). In the 80's, avant-prog destroys the dull, plodding, dreary post-punk that was around. Quality over quantity. The 80's neo bands are certainly the best from their style too. The 80's sucked for everything, so prog only declined inasmuch as music in general did.

Whoever first released an album with incredibly good sleeve artwork, triple-gatefold diecut sleeve etc etc - but only on CD, not on vinyl.
That would be jumping the shark, methinks.

Yessongs

Symphonic-style prog "jumped the shark" around about 1976, and vanilla prog metal somewhere in the mid-90s, but most other styles/subgenres are still going as strong as ever.

For those that don't know, the term "Jump the Shark" was actually derived from a "dramatic" 2-part episode of Happy Days which featured Fonzie "jumping a shark" on his motorcycle.