I did say that LET is a legacy command leftover from the "original" version of BASIC.

Nothing is older that the "original."

GWBASIC was NOT the original, but an offshoot. LET was was required by APPLESOFT BASIC. I know Commodore BASIC didn't need it. I mentioned GWBASIC because it came just before QuickBASIC. It was the same as BASICA, a proprietary version used by genuine IBM computers. BASICA would not run on clone computers because of a slight hardware difference, copyrighted by IBM. The A after BASIC in BASICA stood for "Advanced." GWBASIC was identical except it would run on all compatible computers, not just on IBM.

By the way, I still have a copy of GWBASIC on my computer and I just ran it to make sure that LET was not required.