We had some discussions around the Usage Meter as well after your feedback was sent up. Apparently the desktop client's adoption rate is low now since usage can be checked via the support center and the mobile app.
Regarding the functionality of the current desktop client, it will continue to work as long as it remains installed, but can't be reinstalled on another PC or the same one after re-imaging. As Kathy mentioned, moving forward, your best options for checking usage are the mobile app, the support center, and also the SCC.
As a last resort to advocate for a desktop client, I submitted some options via our suggestion pipeline. If we have any good news to share on that front, you'll definitely hear from us! (Don't hold your breath.)