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Despite the many benefits, there are limitations to the web version. One of the primary drawbacks is that Excel online relies completely on an internet connection, which can be a hindrance in environments with slow or interrupted internet access.
Importantly, not all file formats are compatible with the web version, which may pose challenges for particular workflows. Furthermore, while Excel Online covers many essential features adequately, it lacks more advanced functionalities, including:
Power Query
Power Pivot
Macros and VBA
Additionally, Excel Online imposes file size limitations, which can vary based on your license, with maximums ranging from 30 to 100 megabytes.