Good solid app

I have not uploaded the newest version of WP quite yet, but calendar works fine and has worked fine for many years. I would like to see better management on the exclusions/repetitions of calendar appointments. We have a situation where a regular weekly or monthly appointment will sometimes change one month and I have to write down the exception/repetition dates and re-enter them when I make a change. SOMETIMES, the app will remember them and I can just add the new exclusion or repetition but not all the time, so I write them down every time. I recently started adding featured images to the calendar (photos or other artwork) and it makes the calendar look GREAT and have had no issues. I worry a little about the vast amount of data we have entered over the years and wonder if we should delete some of the older years’ data (2012 or earlier). Would love advise on this.