Earlier quoted context omitted.
Precisely! In the end, life will kill all of us at some point. Until then we have two choices: We either do what we can with what we have, or we don't.
That’s exactly my strategy for shutting down the existential dread mill. Whenever it bothers me too much I’m pointing my attention to how it all eventually turns to dust. The effect of that enables me to try to enjoy the now.
You haven't seen all of them, but the more you see the less value you get from seeing another. So we can conclude that living for an eternity wouldn't be particularly more interesting than living for 100 years, as 100 years is more than enough to see many things in each category. You might not become a world expert in everything, but experiencing the things worth experiencing in the categories doesn't take particularly long to do and after that life is just padding.
The main reason to live now is that there are new interesting things coming out still, since computers are still young. That adds new things over the years. But interesting progress isn't really the norm, it isn't like physics or math has gotten any more interesting over my lifetime and I expect computers to get there before I die and then there isn't much left.
Edit: For example, everything we produce today is based on the same math and physics my grandfather learned in college. There has been no practical progress since then there. Main thing since is new tools enabled by computers that are more precise or automate things, that is interesting but the discoveries enabled by more automation/precise tools will run out at some point.