Originally Posted by
satella
What a lot of people don't realize is how much more popular TBC is compared to Vanilla.
If you only look at private servers, you might assume Vanilla is much more popular, but that is mainly due to the lack of any good open source code for TBC servers.
The codebase for Vanilla is extremely robust, and nearly perfect. With TrinityCore, WotLK has a massive open source project that is constantly being improved.
TBC codebase isn't there yet, so that limits how good the experience can be.
With TBC Classic, the code will be better than even the best Vanilla private server can muster, so you will see an influx of players that didn't even touch Classic.
If there are no new TBC Classic servers, that will discourage new players from joining, because why would they want to compete in an environment where a large portion have massive amounts of gold, guild connections and Naxx gear for leveling/dungeons/early raids?