If you remove it, I would suggest a quick closing summary.
Something along the lines of:
I'm not here to bash Rails, I'm trying to drive a conversation about diversifying the Ruby ecosystem. Ruby needs new frameworks and libraries built on top of solid abstractions. These abstractions should provide services with which a developer can build applications suited to a diverse range of domains. I'm currently building (some projects) to accomplish those goals. If you're interested in a more robust Ruby ecosystem, join us (point to the projects, gitter, or wherever).
Or if that's not quite your goal, just summarize the importance of good abstractions in frameworks
^^ a follow-up to my prev post, related to what we’re doing here
Validator.new(data).calland instead just