Non-biological humanity is such a solution. It makes travel to other systems much easier if we don't have to worry about generations of humans or messy biologic

Non-biological humanity is such a solution. It makes travel to other systems much easier if we don't have to worry about generations of humans or messy biological needs. And for whatever vestiges wish to remain, we could collect the gasses the Sun sloughs off during its red giant phase and use them for fuel, as well as moving closer in - and we wouldn't need the Earth.