Using Classic Outlook on Windows for personal email, calendar, and contact management
I guess "Acceptable" depends on who you're asking. Based on OPs initial concern, this reasonably seems like it covers it, and was helpful/sufficient for my needs.
Not trying to be argumentative - I'm genuinely curious - what is a workflow that makes this method wholly unusable? If I recall correctly, you could never get total number of items in each folder to persistently display in the folder pane, only at the bottom for the selected item, so why is hovering to get that info significantly different?