Earlier quoted context omitted.
> As someone who only uses Vim casually, what's an example of a bad default? By default, vim doesn't enable filetype detection or syntax highlighting, so even though it can easily recognize a source file's language, it doesn't.
Anecdotally, this is exactly the sort of thing I have never needed while using vim on a server. Just let me modify content in the word hole...
(As an aside, for me the main value of syntax highlighting isn't the normal case, but rather the case where the syntax highlighting emphasizes a problem, such as an unterminated string or other typo.)