If you're using advanced features because of peer-pressure, then more fool you. If you're using advanced features because you've found a use for them, but you'

If you're using advanced features because of peer-pressure, then more fool you. If you're using advanced features because you've found a use for them, but you're not using SASS and mixins (or similar), then again, more fool you The other vendors are actually churning out progress and the burden or integrating that progress into your work is entirely optional. Microsoft can't even implement years old specs, and the burden associated with their inability to create even a bog basic browser is not optional.