I think that's like the sarcophagus thing, they figured having RDA dye his hair for a few scenes was enough.
I once read a fanfic where Spock used every "miracle cure" of the original TOS series and essentially rewrote the timeline because the author didn't like the JJ verse, it was pretty good.
But it also illustrated why, when O'neill got nanite aged to 90, they didn't take a few years off the odometer, because RDA didn't want to dye his hair.
The knee thing is real though, RDA messed up his knee one year, and they did a lot of scenes in the X fighter, so he had to jump in and out of the stupid thing, so it became part of "O'neill".
I was mad at how robo SG-1 was treated when they came "home" to earth, but that was an entirely appropriate response by the base.
Still felt cold as hell.
And yeah, they ran their own mission from robot warehouse planet. I wonder how many Goauld they zapped.
So yeah, robo SG-1 dead, for good. We don't even get an answer on how they fixed the robot Teal'c.