Glyn Moody writes "There's been a spate of celebrations of Linux's 15th birthday recently. What they're really marking is the 15th anniversary of version 1.0. But do version numbers matter for free software? The 'release early, release often' approach means there's generally little difference between version 0.99.14z, say, and version 1.0. In fact, drawing attention to such anniversaries is misguided, because it gives the impression that free software is created in the same way as traditional proprietary code, working towards a predetermined end-point according to a top-down plan. So how should we be choosing and celebrating free software's past achievements?"