iPhone translates double space as period + space.
If you are the sort of person who cares about typography, double spaces look like poor kerning and make text on this forum, even clumsier to read.
Sorry, but I just can't buy into the claim that it was "evil". I started doing typography (nroff, groff and TeX) on computers 30 years ago and to this date I still see nothing "evil", either with 2 spaces. 1 space, or 1-1/2 spaces (granted I distinctly dislike no space). Which I use depends on what the work is supposed to look like. I'm the kind of guy that literally goes over things with a magnifying glass, and might move parens up or down a point or two, commonly moves the dash in a telephone number up or down a point or two, and yes I use different spacing between sentences.Which is to say that I am extremely critical about the form of work that I produce.Oh, Puleeze!I could care less whether someone else uses two spaces or one after a period. It's a matter of personal style, there is no right or wrong as such. If the boss, or the specified style guide, says this or that, do it. Otherwise, take your pick. Who cares!And note that almost all style guides will say that 1 space is more common, and 2 spaces is not wrong.
Indeed, why bother worrying about anything in fact?It's not like doing things well is really that important and if your composition is a bit off and people complain you cropped their head off, simply tell them to chill out.
It's not like those are equivalents either, and anyone who's perspective is that poor has a much bigger problem to worry about than pointless typography style selections.