The numeric keypad on computers has stayed remarkably consistent given how adept manufacturers are at moving the other keys around the keyboard. It is not a given that Page Up/Down, cursor keys, the delete key and others will be where you expect them to be by convention, these keys can be moved around for 'designer reasons' even on keyboards from the same manufacturer (yes, you, Logitech).
I have yet to see the numeric keypad on the left for left handed users that type in lots of numbers, e.g accountants, data entry clerks etc. We also never had desktop computers integrated into landline phones with a 'phone lock' button to switch over to 'dial someone' mode. At all times the numeric keypad has opted to follow convention as defined by the original IBM PC circa 1981.
It's a considerable inconvenience for me now to encounter a phone-style input. I so rarely dial numbers that aren't already in my contacts that it is unusual to encounter, and many phone number inputs just use numeric layouts. I have to stop and think or my 1s are all 7s.
I have yet to see the numeric keypad on the left for left handed users that type in lots of numbers, e.g accountants, data entry clerks etc. We also never had desktop computers integrated into landline phones with a 'phone lock' button to switch over to 'dial someone' mode. At all times the numeric keypad has opted to follow convention as defined by the original IBM PC circa 1981.