After spending hundreds/thousands of hours with my alliance characters on a server for pvp, this truly feels like a major disgrace to WOW TBC Classic Gold me by blizzard. This will lead to an era of horde rule on all PVP realms. The alliance will be impossible in open world. It is evident by the classicwow subreddit's reaction. Wow is a loser and the playerbase is total trash.
Developers and players convert traditional into retail and in gg.

Do not take it on. You might think you will continue to play your character Classic, but you won't. This is particularly true if you have removed Naxxramas. It is possible to restart with a different character if you wish to keep playing Vanilla. It's much more enjoyable and fulfilling.

The players who would like to finish max , but do not have the means to get there yet. They can either use the tbc changes or remain in the classic. They could join new guilds and begin raiding nax from scratch with a new raid. If they wish to play tbc, then they have to pay for an cloning service in order to get into tbc or to start with a new start. Because the original wow community is gone the cloning process should be free.

All current servers will become TBC servers. The new Vanilla versions of those servers will become available. You can choose between activating that character on either the TBC server or the Vanilla version. If you wish to activate the identical character on both servers, you pay.

EDIT: This post was taken from Blizz. On patch day, you will be able to open Battle.net desktop and choose the game you would like to play: WoW Classic or Burning Crusade Classic. Your current characters will appear on both types of games under the name of your previous realm. Once you've chosen a game to play, you'll pick the character you want to play and then confirm your selection. There is an alternative paid service to gain access to the cloned character from both game types in case you choose to buy WOW Classic TBC Gold play as your character in both. All you have to do is sign in the same way you normally would and play."