It’s a tad waste of time to have to wait for a channel to freeze, especially if it is a long track/with a lot of data spread out, and their’s lots of processing.
Having channel freezing be a background process, so that the particular channel simply is grayed out, and generates no sound while it’s freezing, allowing you to continue moving around your project, doing editing, listening to the rest of the project AND - getting to the next idea…
…Allowing to add other tracks to a queue of tracks you want to freeze, and having them autocomplete.