Part of the reason for using two spaces between sentences was to differentiate between words with periods after them (a.m. for example or a name like S. M. Boyce). This hasn't changed. But the convention of using two spaces has. Why isn't it still necessary? Again, I don't understand.
Typewriters used two spaces to mimic type setters that used an enlarged space between sentences. This wider space in type setting was phased out long ago, but the two spaces continued on straight into the computer age. I was trained on it and I'm only 27. So why is this enlarged space not needed, and why aren't we training our young people on it? Shouldn't we be teaching our students in typing classes to only use one space? But, no, we don't.
There's a lot of controversy on which is more desirable. And the proponents on each side seem to be equally rabid. There is no conclusive data on which is more readable. In fact, while it has become an industry standard in publication to use one space, it has equally become a standard to use two everywhere else. Every other field uses two spaces. Everything. Without fail, except publishing.
So, I get I'm going to have to reteach myself a couple of decades worth of bad habits. I just don't understand why. What do you think?