Oliver,
Apart from the hobby/nostalgia factor, is there actually any real reason to use OS4?
No, there isn't. In fact the hobby factor is the only reason, nostalgia doesn't even come into the picture as OS4 is a new OS. Unless you're referring to the fact that it's been languishing around for the past four years, making people nostalgic for 2004, lol!
Are there aps for OS4 which can attract a user base?
Hollywood is about the only one that stands out even marginally. The rest of the lot are only a draw if you want to pretend it's still 1996.
