For me, my biggest concern is how many of these miners that aren't profitable right now will still be here when there are no more block rewards and only rewards are from tx fees?
that depends on what else it out there for them to mine instead. i guess. no one necessarily has loyalty to bitcoin. if something else is more profitable and they can mine that instead they'll probably do it. and then what you'll have with bitcoin is a bunch of people fighting for table scraps.
If they take losses even with block rewards enabled, I'm imagining what it would look like when the block rewards tap stop following. Either fees are raised exponentially and small users leave or keep fees low and miners leave. If this is resolved, I think Bitcoin will be here for a long time. I mean, we already solved block rewards.
seems like it would be impossible to be resolved. but thanks for your honesty.