> What's nice about their subscription model is that there is no sunk cost when giving up. It's $5/month and you just stop paying it.

Don't they try to get you to make a year commitment? I remember spending about 30 minutes with someone at Adobe getting them to cancel it when Lightroom was too slow to use on my Mac at the time (which had been more than fast enough for Aperture). After the second or third time that I told them I wasn't going to buy a new computer just for the privilege of running their software, they agreed not to charge a hefty early termination fee.