Being still in the "single digits," I thought the same thing back in '78.
I say the show jumped when they added a soundtrack and began
focusing on the Fonz and not Ron Howard.
I had forgotten how points of "The Sopranos" early on proved they were washed up! (And how right they are about the "Irish" son!:
THE SOPRANOS (1999- present)
Jumped The Shark when... Votes
Never Jumped 252
The fourth season 82
Tony's dream at The Plaza 75
Death (Big Pussy) 35
Death (Ralphie) 27
Day One 20
Waiting for the fourth season 20
Carmela and Furio 14
Fourth season finale (Carmela kicks Tony out of the house) 12
Death (Nancy Marchand) 12
Native Americans protest of the Columbus Day parade 12
Death (Adrianna) 10
Singing (Junior) 10
Tony's sister Janice shows up 9
Annabella Sciorra joins the cast 8
The third season 8
Janice "gives it" to Ralph 7
Death (Jackie Jr.) 6
The talking fish 6
Blatant Product Placement 6
The second season 6
They forget about Dr. Melfi 5
Death (Paulie kills the old lady) 5
Not That There's Anything Wrong With It (Vito) 5
Bears in the backyard 4
Jumped Back (Ralph gets whacked) 4
Melfi gets raped 4
Same Character, Different Actor (the hot FBI agent) 4
Ralphie 4
Death (Richie) 4
Christopher goes to rehab 4
Michael Imperioli writes 3
Meadow talks to Special Guest Shrink (Linda Lavin) 3
Everyone's gaining weight 2
It becomes a "family" show 2
David Chase agrees to The Sixth Season 2
Meadow goes to college 2
The racetrack 2
Special Guest Star (David Lee Roth) 2
Tony outruns the FBI at Johnny Sac's house 2
Dream sequence 1
Tony attacks the therapist 1
Tony's son looks Irish 1
It became New Jersey, 90210 1
The cell phone batteries never die 1
Death (the stripper) 1
Tony the sex symbol 1
"Don't disrespect the pizza parlor" 1
The lamp episode 1
Singing (Meadow) 1
No plot follow-up 1
The Sopranos Family Cookbook 1
Carmela worries about the finances 1
Death (Pie-Oh-My) 1
Death (Adrianna's dog) 1