I suppose in part it is because I simply reached the maximum level of frustration with my previous set of tools that I could stand, and have had to start looking at alternatives. (Unfortunately, this happened with a number of things all at once, so I'm looking for replacements for several of the tools I use constantly.)
In part it is simply because I need more practice writing. At one point in my life I did a lot of writing, and fairly easily. Of late, it's been harder and has happened much less. I need to get back into practice.