There is a related feature in QGIS that in not present in M8 and I hope that will be included in M9. I have sent a suggestion for it in the past, so I am writing this in case other people don't know it and maybe they would like to see it in M9 and send a suggestion.
The feature is the option to save easily a raster from an online WMS server to disk. You set the limit coordinates of the region of the world you want to download, resolution, and other options and you get the raster. You can see how it works in videos like this: https://www.youtube.com/watch?v=lpf0MsphUYw
It is so much faster that what you have to do now in M8: You go to the scale you want, and you have to pan around the area you want to save (without zooming in and out, so to avoid different resolutions in parts of the image), so it is catched. If you manage to cover all the area without leaving out some part, you can then Save as image. This method is much slower than the way you can do it in QGIS.