I like/love gadgets too, but am pretty selective about what I actually buy, so I end up with good kit I keep and use a long time before replacing. Something has to be significantly better before I move on. LED bike lighting and newer dynamo hubs fall into that category, for sure. 10- and 11+ speed derailleur drivetrains? Notsomuch. I'm still happily running 5-speed freewheels on several of my bikes, friction-shifted, of course.
Tangential to this thread...
I've noticed a disturbing recent trend in newer battery bike lighting: The embedded rechargeable battery. This all appears fine and good at first glance, but can be a real downer for the rider who does nighttime brevets and such. Once the battery goes flat, you can't simply swap in a new pair of AA cells and go on as before. No, you're suddenly in the dark or tied to a mains charger for the next 2.5 hours till the thing is full again unless you take a second charged light to use after the first one dies.Then, once the battery ages and cannot hold a charge so long anymore, you also can't replace the battery. A light perfectly good otherwise goes out to the landfill. Manufacturers love this, as it means lower design costs (no battery door, soldered battery tabs, sleeker styling), and a way to market a fraudulently "green" product. Far better to use rechargeable LSD (low self-discharge) Eneloops and have the freedom of mid-ride battery swaps and a longer product service life.
A user-replaceable battery was a major determinant in my choice of smartphone. Same thing for lighting.
With the newest gadgets, sometimes all is not as it first appears, and a gimlet eye pays dividends in avoiding a wasted purchase.
All the best,
Dan. (...who loves "looking" just the same!)