Assuming you survive the heart-stopping moments of anxiety during the show, the final manages to mix a heart-rending moment with a bitter-sweet ending (especially due to what we know about future events the characters wouldn't know at the time). Subsequent events would weigh heavily on all the decisions made by the characters at the end (and make it even more poignant as time passes).

when the mom looks up on the train and sees the daughter standing there and it’s cut so that wailing part of “with or without you” hits right at the same time - i GASPED