I would willingly put up with the stupid arrow syntax if I could use ← for it, and with the gratuitously confusing to people coming from other languages use of

I would willingly put up with the stupid arrow syntax if I could use ← for it, and with the gratuitously confusing to people coming from other languages use of [[ ]] for an element of a list rather than a sublist if I could use ⟦ ⟧.