It's the interface: a grid of editable cells is incredibly easy to use and as almost as information-dense as possible.
It's interesting to see non-excel/google sheets products use the same interface to good effect. Examples don't come to mind but I'm sure there are some.
This is a valid point! Anyone who has built an admin dashboard knows that the UX of being able to edit any field in any row on an Excel is hard to replicate without additional edit buttons and dialogs popping up.
Agree. Also hard to beat the ability to create pretty reports as well. This is why many financial forecasting systems have connectivity to Excel to allow for the creation of reports.
It's interesting to see non-excel/google sheets products use the same interface to good effect. Examples don't come to mind but I'm sure there are some.