syntax doesn't typically matter as long as you are at least as productive as in other languages. i.e. if editors can do the same things with keybindings.

The problem with the (* *) comments is that I can select a block of text, a portion of which is already commented out, and commented the whole selection. You can't solve this without lossy commenting (e.g. removing the inner comment). The portion that is already commented will screw it up. This doesn't matter in single line comments since it will just add an additional "//" in front of a commented line.