"Well, let's say you can shave 10 seconds off of the boot time. Multiply that by five million users and thats 50 million seconds, every single day. Over a year, that's probably dozens of lifetimes. So if you make it boot ten seconds faster, you've saved a dozen lives. That's really worth it, don't you think?”
Somewhere along the causal chain of "what went wrong leading to this death", almost certainly there will be some cases of a slow app indirectly (maybe even directly in some cases) causing deaths. It's a question of what we mean by "cause".
That's not even counting loss of quality-adjusted life years from time spent staring at a screen waiting, like being stuck in traffic.
"Well, let's say you can shave 10 seconds off of the boot time. Multiply that by five million users and thats 50 million seconds, every single day. Over a year, that's probably dozens of lifetimes. So if you make it boot ten seconds faster, you've saved a dozen lives. That's really worth it, don't you think?”