Wow, so much text!
Thank you for sharing your opinion! I can see you really like RoR :)
I think you underestimate PHP and NodeJS tho. PHP developers are really cheaper, PHP is really much more widespread across junior and middle developers, and if one knows PHP better and needs an MVP in two weeks, these are obvious reasons to stick to it.
RoR is really great tho, this is why I've given it compliments :)
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