“ There's a brief shot in the episode that shows the NX has its previously unused refit configuration with a secondary hull. That was originally intended for use if the show made it to Season 5 and leading into the Romulan War. ”
“ One thing I noticed on here was that the NX-01 was given a USS prefix. So it either entered Federation service of was given an honorary prefix as part of what it did to bring the Federation together. Also the fact that the NX-01's class is just NX-01 Class and NX-01 Refit. Makes you wonder if the... ”