There's also another way to interpret that. For me for example, I have the same PC for 5 years now, and before that I had the same one for 10 years. Basically, I run it till I really really can't. I can afford replacements more than once every 10 years, but I don't buy it simply cos it's not necessary. But in this situation if I had a similar fondness for valve, I might go ahead and buy it and cut short my not-for-affordability-reasons wait.

I know a lot of people that behave this way with phone purchases.