Re: life-extension technology in Star Trek (or lack thereof)
What about DeForest Kelley who was in TNG's first episode as the 200 year old McKoy? Certainly age has been extended to some extent without some technology being installed. I'm sure McKoy wouldn't let such devices be used on him anyway
Judy Waxhorn: "Lighbulb is shot can't see a damn thing. Prepare to trash the ship. LaForge, disable the warp-core protection system. Troi, take the helm. All hands, prepare for DRAMA."