I'm not any kind of collector, and have little interest in "vintage" saws. Words like vintage, antique and collector's item are euphamisms for "other people's old, broken down crap" most of the time.
But, when a saw doesn't seem to be running right, or breaks down, or the chain is dull... I haven't got time, usually, to mess with it. Easier to grab another saw. I don't like using a saw that's too gimp for the task at hand, or lugging one around that is too much overkill for the task at hand. So, I have quite a few saws.
Then there's that whole love affair with technologies and equipment that actually perform work or do cool things. Or, even just looks cool. It's a powerful attraction.
I'd guess that shouldn't really be a mystery or a surprise. If I had my way, I'd trade my wife in every year for the latest, newer model with improved features. For long term survival, however, I think I'm safer getting a newer chainsaw, no matter how dangerous they are. They're as safe as marshmallows compared to a p*ssed off wife.