I have an iPad Mini 2. It's a less than 2 year old device, which should be still considered current given that even Apple assumes that on the average, people keep their iPads for 3 years.
If I try to open a link to an Excel file on Onedrive, or even an Excel file embedded into Onenote, it takes for freaking ever.
If I open a link to a Sheets file in GDrive, it's about twice as fast.
Why can't MS make their own shit work together ?