Now I'm curious - what other syntaxes are there?
Rather clunky and most UNIX Assemblers were never as powerfull as other systems macro assemblers, since after UNIX System V, it was there only as an additional external tool pass for the C compilation steps, and even before that, the assembler was quite minimalist.
Then there is the whole brain twist of being used to op dest, src, and having to switch into op src, dest.
I prefer the Intel approach as it is more similar to dest = src, rather than src -> dest.
Intel's approach is also more common across various assembly languages.
The silly thing is importing one order to another architecture that uses the opposite order. Now your users have to transpose operands for no reason. The really silly thing is messing up the operand order of the cmp instruction in the process. The VAX assembly language had a compare with the sane operand order, BTW.