> Note: my file manager even identifies the mime type without extension. That is how it should be, changing the extension should not make the file harder to use. To this day, AFAIK, windows file manager still uses the extension to identify file type, thus allowing the user to easily change it may break expectation. GNOME's nautilus, KDE's Dolphin and even Apple's finder do it right: press f2 and you can rename the file without changing the extension, unless you go out of you way for that.
You've just confounded two different concerns: filetype identification by file managers and the interface to rename files. If you're not just cribbing some bad Intro to UX course, you'd know that Windows Explorer has always gone out of its way to howl bloody murder when you accidentally changed the file extension, and since Windows XP most rename file controls preserve the file extension. Your thinking was very sloppy here.
Identifying files by heuristics is a VERY dangerous game. Different systems have implemented it differently over the years, classic Mac OS in particular offering a fascinating alternative to file extensions.
> Also, once it is in the kernel, whoever change any internal api will fix every driver code to keep it working, so things that work once will work for a very long time.
Sometimes. Not always. Don't blindly worship code you haven't read.
You've just confounded two different concerns: filetype identification by file managers and the interface to rename files. If you're not just cribbing some bad Intro to UX course, you'd know that Windows Explorer has always gone out of its way to howl bloody murder when you accidentally changed the file extension, and since Windows XP most rename file controls preserve the file extension. Your thinking was very sloppy here.
Identifying files by heuristics is a VERY dangerous game. Different systems have implemented it differently over the years, classic Mac OS in particular offering a fascinating alternative to file extensions.
> Also, once it is in the kernel, whoever change any internal api will fix every driver code to keep it working, so things that work once will work for a very long time.
Sometimes. Not always. Don't blindly worship code you haven't read.