I moderate /r/flashlight. Something I've seen a substantial increase in over the past few years is people who are surprised to learn that it's possible to have a built-in charger in combination with a field-replaceable battery. It doesn't take much explaining; it just hadn't occurred to them because the devices they're used to don't work that way.
People don't change batteries in their phones now because they'd need a heat gun and a soldering iron and they'd have even chances of starting a fire, breaking the phone, or succeeding in changing the battery without prior experience using those tools. A shop could do it reliably, but the shop will charge 100€ because it's time-consuming and error-prone. A 3-5 year old phone is often not worth 100€.
When a battery change costs 25€ and takes 5 minutes, people will do it all the time even if they don't know that today.
re: flashlights.
Still no real upgrade for hexbright, which is a shame.
I wish they were still being made. Fortunately, mine are still fine, and I expect to be able to repair them should they break. (xtal is a common failure point apparently)
Standard battery type is nice, but also has microusb charging port, the part that didn't age well.
Perhaps new circuit boards (with usb-pd charging, usb-c connector and mems oscillator) will be the way forward. It's definitely easier to order a pcb than the housing.