Since this season of The Goldberg's began I have mentioned a few times that I noticed Pop didn't appear much, usually just in short cameos and in most of his scenes he was sitting on the couch.
I feel like his last two appearances, the two posthumous appearances by George Segal, had Pop be a little more active than he had been this season.
Last week's show had a dedication sequence to him. I feel it must have replaced an ending tag or another video comparison to something in the episode. This tribute was more important, but I wonder what kind of video footage they would have shown otherwise. The episode has a scene with Adam doing a parody of Take on Me with rotoscoping equipment, I wonder if Adam F. Goldberg really did that (and if that's what we would have seen).
During the two years that School'd was on the air, the teachers who made their way to the spinoff didn't appear on The Goldberg's often. There were episodes with explanations that some of them had left the school and would eventually come back, but I don't think they needed to, they could have just not showed them. And yet since School'd ended, I don't think any of the cast who made the jump had come back (well, I think Lainey made a guest appearance). Johnny Adkins was a regular on both shows at the same time, but he doesn't appear anymore.
But many of the supporting characters haven't appeared much (probably because of COVID concerns). The JTP outside of Geoff have only been in a few episodes (had their appearances in the previous season been sporadic as well?), I think Emma Mirsky made her first appearance of the season in tonight's episode, Uncle Marvin hasn't been on the show this season (they didn't do a Thanksgiving episode this season).