The issue is that it takes a ridiculous amount of energy to transport even 1kg of matter from one solar system to another in a reasonable amount of time. We're

The issue is that it takes a ridiculous amount of energy to transport even 1kg of matter from one solar system to another in a reasonable amount of time. We're more likely to upload our minds and run them on a small and energy efficient computing substrate. After seeding a new solar system with appropriate infrastructure, we can then just transmit ourselves from place to place.