Can indefinite life extensions be achieved in our lifetimes?
I have no reasonable doubt that we can extend lifespans indefinitely.
The big questions are:
Will we (as a society) devote sufficient resources to make it happen?
Will it be available to all?
Will we take the next necessary step, of restructuring our social, technical and political institutions to deliver the sort of contexts that actually deliver both freedom and security in sufficient abundance and reliability that people actually get the real chance to live very long lives?
It is this latter question that has dominated my thinking for the last 43 years.