No, I think we shouldn't merge those two tags. Some CS:GO questions may not apply or make sense for CS2 anymore. And according to Wikipedia’s CS:GO article and Steam Support's
"Legacy CS:GO Version" article, CS:GO players can still access community servers, and a legacy version of CS:GO was released later for outdated devices and platforms that cannot run CS2. Basically, CS:GO will continue to exist independently of CS2.
Official matchmaking for Global Offensive was shut down that day, though players were still able to connect to community servers. A legacy version of Global Offensive was later released for outdated devices and platforms unable to run Counter-Strike 2, though matchmaking was still disabled. Additionally, the game remains playable on Xbox 360.
- Wikipedia’s CS:GO article
If you are unable to launch Counter-Strike 2 with your current hardware, you can access a legacy version of CS:GO. Support for this version of CS:GO will end on January 1, 2024.
What is the legacy version of CS:GO?
The legacy version of CS:GO is a frozen build of CS:GO. It has all of the features of CS:GO except for official matchmaking.
What will happen after the end of support for the legacy version of CS:GO?
After January 1, 2024 the game will still be available, but certain functionality that relies on compatibility with the Game Coordinator (e.g., access to inventory) may degrade and/or fail.
- Steam Support's "Legacy CS:GO Version" article
We should add tag usage guidance to both tags’ tag wikis to avoid users using the tag for the wrong game.
Relevant meta discussion posts: