What's wrong with low G tolerance for interstellar travel?
If speed of light is ~310^8, 1G ~ 10m/s^2, you would need (ignoring reletivistic effects) 310^7 seconds to reach the speed of light.
There are 86400 seconds in a day, so you would need ~347 days to reach the speed of light if you were accelerating at 1G, were it not for relativistic effects.
> iirc we don’t have “permanent” acceleration tech
Which is exactly why low G-tolerance doesn't matter. You have a limited amount of delta-V, whether you apply it all in one go or spread out over a year makes little difference given the timescales that are already involved in interstellar travel.
