Transient is the worst part about Magit IMO (the best parts are how you can prepare a commit to just include the right changes, or the functionality bound inside the transient menus that make complex operations such as fixups or rebases trivial). Transient UIs are consistently uncomfortable to work with, and could usually be replaced by just using a regular special-mode keymap in a custom buffer. The fact that Transient hooks into the MVC and breaks elementary navigation such as using isearch or switching around buffers has irritated me ever since Magit adopted the new interface.
The real neat thing about Emacs' text interface is that it is just text that you can consistently manipulate and interact with. It is precisely the fact that I can isearch, use Occur write out a region to a file, diff two buffers, use find-file-at-point, etc. that makes it so interesting to me at least.
A far more interesting example than Magit is the compile buffer (from M-x compile): This is just a regular text buffer with a specific major mode that highlights compiler errors so that you can follow them to the referenced files (thereby relegating line-numbers to an implementation detail that you don't have to show the user at all times). But you can also save the buffer, with the output from whatever the command was onto disk. If you then decide to re-open the buffer again at whatever point, it still all looks just as highlighted as before (where the point is not that it just uses color for it's own sake, but to semantically highlight what different parts of the buffer signify) and you can even just press "g" -- the conventional "revert" key -- to run the compile job again, with the same command as you ran the last time. This works because all the state is syntactically present in the file (from the file local variable that indicates the major mode to the error messages that Emacs can recognize), and doesn't have to be stored outside of the file in in-memory data structures that are lost when you close Emacs/reboot your system. The same applies to grepping btw, as M-x grep uses a major mode that inherits the compile-mode.