It's questionable why any web service needs to write to a file anyway. Writing data to a filesystem on each web server node seems like a good way to lose data,

It's questionable why any web service needs to write to a file anyway. Writing data to a filesystem on each web server node seems like a good way to lose data, Also, one of my pet peeves with language runtimes is you can't easily embed them because they are full of hardcoded filesystem calls; ruby (not mruby) checks all over the Unix filesystem looking for config files and gems and stuff... ugh