One thing that worries me about Foss is the eventual lack of updates and potentially become abandonware. Many people mentioned that the Foss apps protects are a side project for most developers. They could easily lose interest or have other things happen in their life that take up more of their time.
These arguments are valid for closed source as well I agree, but this being the devs main focus makes me feel better about updates in the long term.
Very good point as well.