Anniversaries are occasions for celebration and reflection. The thirtieth anniversary of BISA presents the opportunity to look back over what has been achieved in the eventful years since the foundation of the Association, but also the duty of identifying things that have gone wrong, paths not taken or promising avenues that turned out to be dead-ends. We owe it to the people who founded BISA – some still here, others, sadly, gone – to preserve the critical spirit even when celebrating our achievements, and I will certainly honour that debt in this talk.