What is your opinion about the future of the open source automation framework when used for RPA?

Open source framework certainly has greater potential. In my opinion, when certain shortcomings are identified, solution to such shortcomings would be slow. On the other hand SAAS products provide that dedicated support and intent to make that issue sorted out in a fixed period of time. My team uses  Python as well. It has fantastic potential to scale. If there is a custom niche that we want to build, Python will be a fantastic choice with its abundant packages and libraries. 

Great idea to have open source automation framework! Python not a bad choice, perhaps to have a flexible of languages choice like unix, powershell, VB/ASP, Java etc. to reach out more group of developers to join and contribute.

In general, Open Source is a good choice, whatever the automation solution you are planning to use. However, it takes longer to improve the tools compared to private solutions because collaboration is critical to having open source tools at the same level. On the other hand, the more you use, the more you collaborate and accelerate your improvement ... Moreover, who doesn't like free tools ...