I've just been looking at the various incarnations of the QANTAS logo. From 1944 to 2016 it's had rather a few changes. A great site to see the journey is: http://logos.wikia.com/wiki/Qantas.
In 2007 the logo changed to be the flat version that a lot of companies changed to around that time. The explanation (as I understood it) was that companies were conscious of download speeds, responsive environments, making sure their logos scaled well.
In 2016 however, the logo changed again. Back in is shading, gorgeous curves - the text has been sharpened and made easier to read - the tail fin now looks like an aircraft tail fin. It looks .. modern!
So when did logos start getting shading again?