That's a great excuse. IE6 sucked so Chrome 38 might as well still suck. Yeah CSS3 support is split up all over the place, but there are a certain small set of really useful core features that just about every browser supports, and are particularly more useful for webpages than other features. Pretty much everything in that small list of features is supported by IE10+, Chrome 10+, and FF 4+. Sometimes support requires with vendor prefixes, but it still works. Except gradients on Chrome. Up to version 38 still and you can't make basic angled striped patterns for backgrounds, or smoothly blend two colors over a large distance.
And sorry, if you're talking about security, let's talk about privacy. Google is to the point where I'd rather trust Microsoft with my personal information over Google, so that's a huge sting against Chrome, and I'm not really trying to advocate IE here. Firefox is pretty much where people want to be, especially given how much better adblock support is there.