It's down to cost benefit. If life has taught me anything is to never be an early adopter, unless you absolutely have to. It applies to many things but specially in tech: never buy the first version of a device (in fact, you'd be spending more money for a worse experience), never use the .0 major version of something important enough, never use the beta version of something unless you must do (e.g. you're a dev and you're preparing your apps for the next version), never learn a language or framework that just came out because there's 100% guarantee things will change a lot and it may as well die within a year, etc. However, I do learn new stuff all the time but they're things that have been somewhat established and solve problems I have.

There's also the thing that one may be depressed for one reason or another and then feels like doing nothing new anymore and just want to play with the known - which is a quite natural reaction, but shouldn't be confused with getting old.