Those are great advantages. But also to compare to non-repeating sections: you have to manually create the html for all 10-120 of them, and if you dont get the number right, you have either a lot of wasted space, or players frustrated because they dont have enough space. The actual html for a repeating section is very compact - you essentially just create one row, and the sheet automatically creates all the rest. The only downside of using a repeating section is the attribute names for items within it get very complex. That can sometimes be an issue for things you might want to make macros for, but for things like magic item lists and general equipment lists, there's no downside at all. For those where it matters, you can create buttons to mostly get rid of that issue.