No, it isn't. lol
I have no end of devices that have lasted years, especially things without moving parts.
There's nothing wrong with any of the normal phones I own or the smart phones Ive owned.
A dedicated GPS is built no better than no end of cheap smart phones on the market.
At the end of the day, they're all just a plastic or metal case, with a chip board and screen, except dedicated GPS devices are way underpowered, and do much, much less.
My 5 year old Ginger Bread smart phone with BCN, that's had no software updates for years, is as good as, even better in some ways, as a top of the range garmin.
Dedicated GPS devices are a massive rip off, and that's it!