Hi,

Yes, indeed there is such limitation with the export to excel on the client because file contents constructed entirely in client-side and it depends in each browser ability to store formatted strings (e.g. JSON) that processed by every browser. Every browser has its own limitations and I'm afraid that in most cases we don't have control over them.
That said, exporting large amounts of data during export will generate strings that might be too long for the given browser.
In this case, I we can recommend to use server export - one possible approach is explained in this forum thread for example - https://stackoverflow.com/questions/49922780/initiates-the-excel-export-large-number-of-rows-using-kendogrid. Currently we don't have such resource specially made for Kendo UI for Vue but we will do our best to add in the near future.

Regards,
Plamen
Progress Telerik