For clients, using the editor makes sense, until you want to edit dates/times.

They can edit everything (ie. on an event schedule) except, you guessed it, the date/time. So you might as well stay in the designer mode to get the job done.

Here is past webflow project that is heavily date/time dependent. 

http://delmosports.com/events/escape-the-cape-new-jerseys-best-triathlon

I sort CMS data based on this this date/time picker field.  So changing it to text for the sake of editibility wouldn't work.  Then I cannot sort properly..