I must totally disagree for a couple reasons. First of all - much of the article you provided a link for is old info, at least much of it is. The popularity of the 10mm has increased dramatically since the time the article you referred to was written.
Regarding the gun itself. If I were to only own one handgun it would be the 10mm. The available loads are so plentiful - you can load it with light loads and you are basically shooting a .40 cal pistol (power wise) or load it with the hotter stuff like DoubleTap, Corbon and other and you have close to magnum power. I read that in Alaska one police force carry the 10mm as it is effective against polar bear.
My Point? Why not have a gun that can do it all? That line about ammo availability? B.S. Some Wal-Marts even carry it. Even now with this ammo shortage. But I prefer to buy ammo online in bulk. Given that, you can get 10mm from hundreds of online sellers.
Most rumors about the 10mm being a dead round is derived from out-dated articles that are being quoted as if it it is recent news and statistics.
I also own a .45 (Glock 30) and it is a great manstopper too. But don't discredit the 10mm based on outdated info - and especially if you have never owned one or at least shot several rounds of 10mm in different power loads.
Again, if I was to own only one pistol it would be the 10mm because it can do it all.