20% at Atlassian is actually going pretty strong. Every team in the company does it slightly differently—some teams schedule a day a week, others set aside a "20% week" between releases—but it's much rarer these days that you hear complaints that developers don’t get the opportunity to exercise their time. It took a while, and I think part of that process was proving that the programme actually produces results sufficient to justify its existence. These days it’s rare that we have a release of our products where one of the marquee features isn’t something that came out of a 20% project or ShipIt competition.