Client side analytics is the most prevalent though because it provides far more useful, actionable, information. Everywhere I've worked we have used it in one form or another.

It will take some time for people to adapt to server side analytics since a lot of places won't have that solution in place. Or more specifically a solution in place that overlaps with what client side analytics is meant to be providing already (they may have other server side analytics, like performance and hits).

I get that, but in regards to getting raw browser marketshare, client-side code isn't the only way.