Question about UNet (Old multiplayer system)

I know it's being deprecated. Then, Is it impossible to connect to existing game that uses UNet after early 2022? or Is it just impossible to make a game with UNet?

Looking forward for response!

 

Unet itself doesn't depend on any outside services. If the game works today, it will work in 2022, and probably 2032. If the game uses the Unity Multiplayer Service, well those games will all stop working as soon as Unity shuts those servers down, but that's a separate issue from Unet itself.

 

Thank you!