When will be expecting the new LTS version of ember after v3.20?
The next LTS version will be 3.24, but it won’t become LTS until 3.25 is released.
Basically LTS releases are every 4 minor versions, and they become LTS only after the next release. So 3.16 became LTS once 3.17 was released, 3.20 became LTS once 3.21 was released, and so on.
EDIT: and since the release cycle is 6 weeks it would be ~24 weeks between each LTS release.