I was impressed as well, last time I was there in 2011. (Bolu). That's not the largest city around, more akin to a Austin / Houston if you want to make the comparison between US cities, and the amount of development was crazy. Roads, resorts, parks, tunnels, everything. I couldn't believe it. They also had Electronics arrive as we got them here, for the most part. I remember there was always massive amounts of lag, as far as availability of goods went growing up in Germany and then the US, compared to Turkey, but now it seems more on par. When I was a kid, my cousins thought my Gameboy was some Alien Technology of Amazing.
Parts of the development were also sad, as I discovered they were building a new road around my moms birth village, taking a huge chunk out of the cliff-face behind it. I used to go up there with my cousins and my grandmas cows as a kid to let them graze, but that's no longer possible. It's no longer possible not only because of that geographic change, but also the economic as all my family has moved into the city. I literally saw my family in Turkey go from country-farm based to Urban/City based within one generation.