In my case it's more a matter of, hey, this ship seems to be, well ok not already sinking but rudderless and heading into uncertain waters, so it felt like a good time to look at some options. Not in a panicky way, I have generally had a great time with Sonar and will probably keep using it for a while at least while learning something else, but just to see where other platforms were at these days.
I checked out most alternatives to some extent, and found that while Studio One had a lot going for it, snappy and responsive and well designed, it was Reaper that felt the best to me personally. I'd always liked the whole concept and ethos behind it, but hadn't looked at it for a while and remembered it as being not quite ready for prime time compared to Sonar, but frankly that has changed. I'm not sure why it would be seen as the 'more stripped down option' as someone suggested above, it's actually insanely deep at this point and with all the community add-ons, very powerful indeed.
I was having a spot of trouble with Sonar for a couple of days there - not its fault really, but it gave me some trouble around an Arturia update that, in comparison, didn't make Reaper flinch, so I did a couple of tracks in Reaper just to get the feel of it, and realized... yeah, this is where I want to be going forward. It's just a good fit for me. Probably better overall than Sonar, if I'm honest.
I would likely not have come to that realization if it weren't for this CW debacle. I have nothing particularly against Gibson; I do think this whole thing is unfortunate and a terrible waste, but I'm not in a position to assign blame over it (that hasn't stopped a lot of people here from doing just that, mind you). I just know that I've found my way forward, and am more interested in getting on with making music than ruminating on what went wrong here.