Good article overall, I think it's fairly common sense. But I don't think purchasing things and experiences themselves are mutually exclusive. Experience is living in general. We crave change and difference all the time even though we're pretty stubborn to change.
I agree that experiences make you happier over the long term, but not necessarily a vacation itself. A vacation, for me, tends to normalize in the same way a physical object would. It's the little everyday experiences of living that make it for me.
I was going to try to argue that computers and TVs actually provide new experiences everyday. Well, they do, but there are reoccurring costs to get the "new expedience" everyday.
Also, the article didn't imply traveling was the only way to get new experiences. Sometimes simply changing things up qualifies as a new experience even if you've done that thing before. For instance, things you've learned since last doing that experience may make doing it later on more enjoyable. You may have went to DC as a kid and found the experience to be exciting, but then subsequently learned tons of Amedican history making the next trip much more impactful.
I think purchasing things are a type of experience since some things require research, the anticipation of getting it, using it or admiring it, and then just like any other experience it will need to be replaced by another experience. The only difference is you spent money on that experience. That's not necessarily any different to me than spending money on traveling. In either scenario, the experience will normalize.
I guess there is a certain amount of satisfaction gained with trips beyond buying things. But, in the end, buying experiences is a continuous thing.
Good article on how we're always looking for the next experience (some of you have probably already read it):
http://waitbutwhy.com/2014/05/fermi-paradox.html