It's all subjective...
Words like 'antique' and 'vintage' mean different things to different people--and sometimes to different groups. One could even make the argument that we here at Vacuumland might be unwittingly contributing to that misperception. Someone perusing these boards for information on their G3 would see that we use 20 years as the dividing line between 'vintage' and 'contemporary' vacuum cleaners and thus deduce that their G3 might be 'antique', but it's really just an arbitrary distinction. My Kirby G5, which was made in 1997, qualifies as 'vintage', but my G6, which is two years newer but basically the same machine with a different color scheme is still 'contemporary'. What will be even more hilarious is next year my 1999 model Gsix would be considered 'vintage' but my other one, a "2001 Limited Edition", would still be 'contemporary'. To be clear, I'm not trying to start any flame wars here, just pointing out a bit of irony.