longevity and immortality

Introduction

21st century science empowered by AI-driven advances currently on average add 3 months of life to every 12 months you live, thus a healthy 60 yr old on this basis could live 5 years or so more than the average life span of around 85 years (although Covid-19 pandemic may have had a negative effect on the long term quality of the lungs and blood vessels and new issues such as nanoparticles may also impact this)
it is possible to coarsely estimate a biological age for a person to help very approximately determine their potential longevity at current levels of science and access to healthcare.

this is not true immortality as it does not allow your life's memories and your learned personality, etc to be persisted in a biologic physical body
in addition, all of these can be terminated and are thus not immortal in any sense

this is the opportunity to teach offspring your life experiences which can get passed down, or alternatively be remembered by others through a record of your life in analog or digital media
for many people this is a key component of what gives meaning to their lives

this is the passing down of some of your genomic and epigenetic changes that have resulted from your life experiences to offspring
for many people this is a key component of what gives meaning to their lives

some animals such as worms can be chopped into hundreds of pieces and each will regrow a head and tail with the same genome
science has successfully cloned animal embryos such as sheep into adult animals

may be possible if science reaches the Longevity Escape Velocity although you will still die for a range of potential reasons (eg. catastrophic injury, no timely access to post-modern healthcare, etc)
if science could increase your life span by 12 months not 3 months every year you live then we will have reached the Longevity Escape Velocity which would theoretically allow very long life spans of over 120 years IF you are already in reasonable health when this occurs and IF you have the money to pay for the science to keep you healthy and not ageing or developing cancer, etc. Some influential people such as Ray Kurzweil believe this could even be achieved by 2030 - although maybe only for the billionaires.

the creation of an AI digital being embedded with memories, personality may not be too far away