That's not a good comparison. VHS was a standard that the VCR makers themselves helped create so of course they'll be inter compatible forever. Youtube didn't m

That's not a good comparison. VHS was a standard that the VCR makers themselves helped create so of course they'll be inter compatible forever. Youtube didn't make iPads and Apple didn't make Youtube so there's no guarantee for them to be compatible forever. A better comparison would be how long Apple chooses to provide OS updates to iPads and Macbooks since they're all made by the same company.