User blog comment:FairyRaven/Fairy Tail Chapter 337: The Golden Plains, Review and Commentary/@comment-60.53.102.237-20130703114213/@comment-7418318-20130703115004

Except that we see her going to the "golden plains", so future Lucy still exists in some form, most likely an afterlive, which would mean that the timeline itself also still exists

With all the connections severed, that "old" timeline is now most likely inaccessible to the people form the "prime" timeline and thus it's as good as non-existant for them.