[ronancremin]

Rumours of it's death are premature. It's used by over 80% of the Alexa top 100 sites. http://mobiforge.com/designing/blog/server-side-device-detec... Why? Because it can help tailor the user experience, reduce page payload etc.

You can test whether a site is using UA detection here: http://hydra.mobiforge.com

[quarterto]

And billions of people smoke. Doesn't mean it's good practice.