The most important job of a DB is store records which largely consist of numeric (including boolean) values and strings. Strings often need to be outside the ASCII range, and even in existing cases where they aren't supported, it's a limitation of the application and the users would really prefer unicode strings.
Even if you just target English speaking people from the US or whatever, there are a variety of non-ASCII characters that come up all the time, including accented characters, various currency signs, etc.
The most important job of a DB is store records which largely consist of numeric (including boolean) values and strings. Strings often need to be outside the ASCII range, and even in existing cases where they aren't supported, it's a limitation of the application and the users would really prefer unicode strings.
Even if you just target English speaking people from the US or whatever, there are a variety of non-ASCII characters that come up all the time, including accented characters, various currency signs, etc.