Careful friend! You’re about to run into the many people that will at every turn claim that Medium population servers have more people playing on them than any Full Vanilla realm did.
Now, obviously things change and Blizzard’s statement about Medium realms is no longer true. There are some of us that understand that and can look at the data and realize that many Medium population servers are really struggling.
There’s only two things that can happen from this point on:
1.) You transfer or reroll.
2.) Blizzard merges realms.
There’s close to zero chance that we’ll ever see a sudden influx of new players to reinvigorate the dead and dying servers.