I gotta say, I’ve written thousands of lines of assembler and can count the times that inline assembly was clearly useful on one hand. The clear benefits seem to be readability and concentration of documentation.
FWIW I mostly see AT&T when compiling against C codebases to a) avoid requiring a secondary assembler & wanting to support legacy binutils and b) because inline C is AT&T in practice, at least outside of windows (no clue what the c ecosystem is like there). However, most resources exploring “assembly” do so in a context where it makes sense to use intel syntax & work with a “dedicated” assembler.
That said, this is a good decision because C compilers seem to be the major holdouts at this point—binutils has had .intel_syntax for a long time now, it’s just not supported inline.