I am using it for ansible, php, java, c, linux configuration issues or general questions. Preparing excel sheets etc..

It's sped the time I need to produce projects from a usual span of 4-20 days to 1-2 days with another 2-3 Testing. Of course I still bill the time it would have taken me but for a professional it can be a great improvement.

While my country will be slow to adopt, we haven't even adopted to smartphones yet - hooray Germany, it will have to adopt eventually ( in 10 years or so )