This add-on automates something I do dozens of times per day, if not more. I love it!. Google Sheets are fairly light-weight but there is actually an upper limit to the amount of cells in total in the whole file, so for operational sheets with loads of (hidden) tabs with fairly small amounts of data, trimming the empty cells makes a huge difference. Also, when viewing sheets on a mobile device, every cell counts in performance and loading times. The one improvement I can think of, is an added function to crop to data on all tabs in a sheet. Seems to me like a fairly simple loop through all tabs, so here's hoping the developer is able to add this.