Norbert wrote:I think most people are unaware of the differences. (There aren't that many.) This probably means that people will use whatever is available as the default. The default for CusPop is 1.0 (unpacked). That's the same version apoplexy ships with. Also, versions 1.3 and 1.4 were added to popot.org 3.5 years after 1.0 was added. Also, maybe people who make a conscious choice prefer to pick the original/first version to really go old-school. Furthermore, since the beginning Total Pack came with lots of 1.0 executables and people used to just copy-paste a directory from there and then start editing. Finally, 1.0 is usually listed at the top, for example on popuw.com. I can imagine that some people just download the first ZIP they see.
Your reasoning is sound but when it comes to those that make a conscious choice, I don't see why they'd choose to go with 1.0 unless perhaps they want to exploit specific bugs it contains, or want to avoid certain bugs that affect only later versions. Can't think of any though right now that would make 1.0 the best choice for a modder who's aware of all the versions.