Pondering Time+Travel and time loops can make for some interesting thought experiments.
https://hiddenremote.com/2018/04/11/ghost-loop-lore-are-ghosts-stuck-in-never-ending-loops
https://skepticalinquirer.org/exclusive/ghost-loop-review-stuck-in-the-same-routine The implications of time loops would have unsettling consequences. Thus, many people have to dismiss the possibility of Time+Travel, because its such a disturbing concept.
https://www.travelchannel.com/shows/ghost-loop
For many people, just the concept of Time+Travel is too disturbing to ponder, given how it would relate to the nature of reality. (TNOR)
https://en.wikipedia.org/wiki/Edge_of_Tomorrow#Plot
https://ew.com/movies/tom-cruise-rewatch-edge-of-tomorrow-emily-blunt
https://www.gameinformer.com/b/features/archive/2015/03/25/top-ten-time-loops.aspx
https://collider.com/best-time-travel-movies/
https://www.ign.com/articles/best-time-travel-movies
https://www.pastemagazine.com/movies/best-time-travel-movies/
https://www.imdb.com/list/ls068617191
The biggest implication would be that this world is part of a cosmic interactive recording and projection of time & space. Yet, the theory & concept of space-time has been around for over a century.
https://thedigitallabyrinth.blogspot.com/search?q=The+Source+Code+of+Donnie+Darko
https://thedigitallabyrinth.blogspot.com/search?q=The+Time+Machine+and+other+things
