I have programmed in C-like languages for aboud 20 years now, 13 of them professionally. I have never ever seen a problem with the use of braces. So I don't think it's that important.It could also depend on what editor you use. Emacs understands the level of indentation you are at, so when you go to add a second line to the `then' clause, the cursor will go to a place where it's obvious that you need braces.I agree with everyone that the most clear style should be used. So use whatever you think is more clear.
I agree with this, after (is it 15 now?) years of coding i have never seen anyone accidentally add code to a statement without braces and failing to add them. Part of it might be because I have mostly worked with coding styles that dictate braces on new lines, and ide/editor support, as you say.