Thank you for writing me back.
I understand your point and I agree that we should strive to make things easier.
It seems that my words came out wrong. All that I wanted to say is that the specified scenario is more easily implemented with the tabstrip, rather than with our current GridView design. If we build it in the grid, we will need to do a major refactoring of our internal data and UI structure, which means that a rather simple implementation on your end becomes a rather lengthy implementation on our end. Taking into account that no other customer has required the same functionality, we doubt that spending time on this request will be of so much benefit to our clients.
I nevertheless logged this as a feature request and if more people require the same, we will add it in our plans. I have updated your Telerik points for the suggestion.
Thank you for your understanding.
the Telerik team