In Avengers: Endgame, the heroes travel back in time to "borrow" the Infinity Stones from the past to use them in the future.
I get that. At the end of the movie,
Captain America travels back to return the Infinity Stones to their various points in time to merge the two timelines (I think).
But because the movie has gone for an alt-timeline mutliverse version of time travel, it's not a problem. It just means that there's now an alternative timeline kicking off in 2014 in which Nebula and Thanos don't exist. That timeline doesn't have a snap. But that doesn't mean that the MCU timeline - the one we've been watching for the last 11 years - is changed at all. Because changing the past doesn't alter the future, remember - killing baby Thanos wouldn't change a thing in the current timeline, as they point out, and that also means that killing Thanos 2014 equally has not affect on the current continuity.
But, if the timelines are reset and the snap still happened and the early events of Avengers: Endgame (before the "5 years later") then aren't the Stones now destroyed in the ongoing timeline?
Specifically, what happened to the Time Stone? Surely Doctor Strange would be concerned about losing it.
(or is the last point opinion based?)