Windows was called 1.0, 3.1, 3.11, 95, 97, 2000. Then they tried names like millennium, XP and Vista and then switched back to numbers like 7, 8, 8.1 and 10. Microsoft's marketing department has decisions, decisions... Severs are named decently like 2000, 2003, 2008, 2012 and 2016.