You assumption holds if constant acceleration/deceleration at 1g is vastly easier to achieve than generation ships or cryopreservation. If you assume the opposite, then you suddenly can colonize the entire universe, only very-very slowly. :-)
No, not really. Even if generation ships or cryopreservation are easier to achieve than 1g over intragalactic distances, it still doesn’t seem likely that it’s possible to make them work over the 100,000 lightyears minimum between galaxies. To plausibly ship living beings between galaxies you either have to invent science fictional fantasies like Niven’s stasis fields or figure out how to send a lot of seeds very cheaply and accept that you’ll lose pretty much all of them. I’m not sure even that’s possible.
Even if generation ships or cryopreservation are easier to achieve than 1g over intragalactic distances, it still doesn’t seem likely that it’s possible to make them work over the 100,000 lightyears minimum between galaxies.
To me it seems likely that if if you can cryopreserve someone for a 1000 years, you can cryopreserve someone more or less indefinitely.
This discussion is pointless. What seems likely to me or you now has no connection to actual likelihood of the technology.
Entropy is a thing. Keeping a machine running for 10 years without regular maintenance is challenging. 100 years is very hard but within the realm of feasibility. 1000 years might be doable with advanced enough self-repairing technology and access to sufficient fuel. 100,000 years? There’s no way any moving part of any kind is going to keep going for that long. maybe if you can figure out a way to eliminate all moving parts of any kind; but even then I suspect random radiation and micrometeorites might erode any ship beyond hope of recovery. Perhaps there’s little enough of that in the intergalactic void that intergalaxy travel is possible, but I wouldn’t rate it as likely.
To grab another idea from Niven (specifically the Puppeteers), gravity manipulation to get a small traveling solar system would probably work, though it would take an enormous amount of time. I’m not an astrophysicist, but you could get solar wind to keep protecting you from small stray objects and presumably could watch the path ahead to protect yourself from other collisions.
You assumption holds if constant acceleration/deceleration at 1g is vastly easier to achieve than generation ships or cryopreservation. If you assume the opposite, then you suddenly can colonize the entire universe, only very-very slowly. :-)
No, not really. Even if generation ships or cryopreservation are easier to achieve than 1g over intragalactic distances, it still doesn’t seem likely that it’s possible to make them work over the 100,000 lightyears minimum between galaxies. To plausibly ship living beings between galaxies you either have to invent science fictional fantasies like Niven’s stasis fields or figure out how to send a lot of seeds very cheaply and accept that you’ll lose pretty much all of them. I’m not sure even that’s possible.
To me it seems likely that if if you can cryopreserve someone for a 1000 years, you can cryopreserve someone more or less indefinitely.
This discussion is pointless. What seems likely to me or you now has no connection to actual likelihood of the technology.
Entropy is a thing. Keeping a machine running for 10 years without regular maintenance is challenging. 100 years is very hard but within the realm of feasibility. 1000 years might be doable with advanced enough self-repairing technology and access to sufficient fuel. 100,000 years? There’s no way any moving part of any kind is going to keep going for that long. maybe if you can figure out a way to eliminate all moving parts of any kind; but even then I suspect random radiation and micrometeorites might erode any ship beyond hope of recovery. Perhaps there’s little enough of that in the intergalactic void that intergalaxy travel is possible, but I wouldn’t rate it as likely.
To grab another idea from Niven (specifically the Puppeteers), gravity manipulation to get a small traveling solar system would probably work, though it would take an enormous amount of time. I’m not an astrophysicist, but you could get solar wind to keep protecting you from small stray objects and presumably could watch the path ahead to protect yourself from other collisions.