I think time travel is fundamentally impossible
I love the idea for time travel, and I consume lots of books and films and so on around the subject. I’m not a frequent visitor to this subreddit for no reason.
However, the common denominator in nearly time travel fiction or discussion is that word ‘travel’. Time is often presented as a tangible thing which we can traverse, like a road or river which - if technology ever allows it - we could move forward or back on relative to our current position.
But as more time passes (no pun intended) I’m becoming more convinced that time is not something we can move along, and doesn’t exist as an object or force that we can manipulate - and that it is simply our brain’s way of perceiving sequences of events in a linear order. It’s like watching a film for the first time on a screen as a viewer - you can remember the events that have occurred since the beginning of the film, and anticipate the events that may come, but you can not change the content of the film or redo parts of it.
And yes, moving forward in time is technically feasible with time dilation - though we are nowhere near the technology level needed to do that - but even that is a side effect of relativity and isn’t time travel in the sense of hopping in a machine and jumping forward 1000 years in a split second.
Happy to be proved wrong