Hi,
I have SL 3 and have been using it for many projects over the last six months. I really like it and am very comfortable using it. I have used it since it first come out.
I also have a perpetual license for Adobe Captivate. What I really appreciated about Captivate is that they update BOTH the subscription and perpetual versions at the same time. Unfortunately Articulate continues to develop and add features to 360, but does not bother updating StoryLine 3.
I will NEVER subscribe to 360 because of cost, unneeded and obsolete applications, and that it is SLOW. All of the other eLearning tools I use are 64 bit applications. So I only use SL3 for small, limited applications.
Fortunately, we have many other options for developing high-quality eLearning. However, StoryLine is like an old friend, and I will be sad to see it go.