Re: 7X04 The Power Of Three (Grading/Discussion) (SPOILERS!)
Sarah Jane and Jo Grant-Jones didn't get to voice their disappointment with being completely dumped for so many years until NuWho and SJA.
It's a bit inaccurate to say Jo was "dumped" since she chose to stop travelling with the Doctor. I think her main issue was that the Doctor never checked in on her in all the years since.
"Internet message boards aren't as funny today as they were ten years ago. I've stopped reading new posts." -The Simpsons 20th anniversary special.