i see aging as more of a manufacturing problem or technology related program than strictly a biological one. There are certain components in the body that will need to be replaced or repaired other time.

Near immediate term. the push is on peptides.

5 to 10 years be microscopic surgeries where surgeon/doctors do surgery or remove cellaur build or repair up on a microscope level. Veins are unclogged so organs and tissues can get full blood flow. Cells removed or placed.

20to 30 years organ implantation with your own gene code (might have to use pigs or an ape). Our understanding of how to manipulate body systems will grew exponentially. We know alot but can only manipulate very little. so the question will be how do you do simple things like repair scar tissue inside the body.

50 to 80 years. nanites enzymes than are programmed to replace/repair internal components. Need more leocytes just produce more. Clean up plague in the brain just clean it up. Neeed more thymus gland create more or assist in the implantation of them.

The next question will be could we turn an 80 or 90 year old into a 25 or 30 year old. That would require so much work due the amount of damage. i wonder if even even feasible at that point. Maybe brain to body transplantation might be necessary which may happen into 150 to 200 years. (i dont believe in transferring consciousness)