Sony is very much a serious contender now. For a number of years they were the undisputed leader in a few areas, mainly value for money and autofocus performance. Everyone complains about Sony menu ergonomics although I personally don't find it to be much of a hindrance. There seems to be some evidence that canon and Nikon are catching up on some of the performance metrics.
On the other hand, for a long time Sony suffered from a shallower catalog of lenses but that grows less and less true by the day. For example they just released a trio of enthusiast compact prime lenses that according to reports I've read rival the best lenses of this type through history.
On the dpreview article about the camera you can see some spec sheet-level comparisons.
I used to shoot with a D2X (dating myself here), and at the time Sony was not a serious contender at this level, at least among anyone I knew or any research I did. Everything was Nikon or Canon. Sony and Fujifilm seem to have some excellent cameras these days and I’m interested in what drew you to Sony versus the equivalent from Nikon or Canon?
Also, have the workflows improved on any of these in the last 15 years or is it still dump raw from the physical card to the computer and edit? Anything that lets you sync to a cloud storage when plugged in after a day of shooting?