It's signed so only 2^63-1s, or 292 billion years.

'bout the same as tomorrow really, better do nothing, for in the end all is dust.

In retrospect we should have made it unsigned, but set the epoch at the Big Bang.

2^63 is just 292 billion years. Beware.

~1/4th to 1/40th the length of time where star formation will still be possible. Woefully insufficient.

Ruler of great size, less useful when measured aspects are a pile of disconnected threads rather than a canvas that is mostly shared and mostly distorted the same way.