It's not just specialization, often it's overspecialization, driven by commercial interests. Even though a generic tool G can do tasks A, B and C well, people are told to buy specialized tools for each of those tasks that are only marginally better at their specific tasks (sometimes, not even that) at the expense of being worse for the other tasks. Hell, sometimes it's the same tool, but with a specialized label and extra markup (e.g. disposable shaving razors for men and women which differ only by a) color, and b) price). But people fall for that.

Shaving razors aren't just different in that - the angle of the blade relative to the handle is different, because it's more comfortable/easier to control for different regions of the body.

The price difference isn't particularly justified, but presumably "face razor" and "leg razor" doesn't sell as well.

Strange that tech seems to be moving in the opposite direction, with single-purpose devices like MP3 players, GPS devices and cameras being consolidated into phones.

I'm not sure it's strange: these are "nomadic" not sedentary devices, you don't keep your MP3 player and GPS device and camera in your shed, you have them on you at all times, so combining them makes for a much simpler nomadic experience.

Not to mention phones are really quite good at being mp3 players and GPS devices and cameras at least for the average person, so the tradeoff is not big.

Also the fact is that the user interfaces are the "huge" part for devices compared to the processing. It brings to mind the cyberpunk trope of full keyboard sized "decks" with a tiny screen if that as opposed to modern laptops which have long used squarer and abbreviated keyboard layouts.

Personal electronics perhaps. I'd argue there are more specialty hand and power tools than ever before though.

That's probable, but at the same time e.g. woodworkers would tend to build their own tools on the fly to fit their specific or personal needs, these tools were not standardised or widely available but I'm guessing the average wood carver in the 15th or 16th century had dozens of very specialised tools, it would just be tools they made themselves or asked a friend to make for them rather than tools they bought from a big box store.