"I've been a PS user since if first came out, and was befuddled as to why they changed some keyboard shortcuts. I tried the new version this year and thought so

"I've been a PS user since if first came out, and was befuddled as to why they changed some keyboard shortcuts. I tried the new version this year and thought something was wrong with my PC or my keyboard. All of the shortcuts are second nature to me, and changing them after all these years for no good reason is a baffling decision." OMG. What? Why?