Just watched Dawn's last episode last night. Its been nearly 6 years since she has been in a new episode. I went back and checked some others (using original airdates). May has been 10 years and a month and a half! Tracey hasn't spoken in just under 12 years. Gary has been gone about 8 1/2 years. Misty's gap wound up being just over 12 years (although more than a year less if Mirage special is considered). Iris has been gone almost 5 years as well (just over 4 with her special). Even Serena is coming up on 2 years, and I'm still surprised she hasn't appeared in some manner. Hope to see all of them and more again someday, but I doubt it.