The problem is that Alt-key accelerators are encouraged by Windows across the entire OS and it has been the case since the very first version of Excel (it really predates Excel)
I love the approach of testing new features on the Mac first, but it isn't sufficient since the Mac version was never updated to be 100% parity with the Windows version, which means some of the preexisting features would forever be missing from the Mac
I love the approach of testing new features on the Mac first, but it isn't sufficient since the Mac version was never updated to be 100% parity with the Windows version, which means some of the preexisting features would forever be missing from the Mac