One of the biggest knocks on Windows on Arm PCs powered by Qualcomm Snapdragon chips has been how well applications run. Natively coded apps run just fine, but apps written for traditional X86 processors (read: the vast majority of PCs) have suffered. In part, that’s because they’ve had to run via emulation, a way of translating the X86 code into instructions that can be understood by the Arm processor. Qualcomm claims that performance won’t be a problem for its upcoming Snapdragon X Elite processors and the PCs they run on. But the company also unveiled a pretty major caveat to that, too. Acc…