I love how the tech world has nearly non stop crapped on PHP but largely left Ruby alone. While I haven't used PHP in about 8 years, I do admire the fact that most websites that use it and then grow massively, then continue to use it. While most Ruby sites that I know of dump Ruby on Rails as they cross a certain size and just can't keep it working.
I can't comment on why this is, just that I have seen it at least a dozen times on sites where the company was crossing about the 5 million in value barrier. The three complaints of the people running the companies are: Can't get truly senior programmers who will touch Ruby. Progress pretty much stops as they fight more and more with their product as performance and new functionality dries up. And usually someone within the company starts using a whole other platform to start redoing chunks of their product with results that make them angry they are so much better.
On one note, the definition of "Senior Programmer" is not someone with many years of Ruby experience, but huge amounts of experience with massive projects. The key to the definition is not just time in the business but a proven track record of putting multi million dollar projects to bed over and over. If they mention Ruby they get no interest from these types, if they don't mention Ruby then these types bugger off when they hear Ruby. But when the prospect of hiring them to replace the Ruby with a whole new foundation, they are usually very interested.
A decade ago, Ruby was hip, It is not hip, it is often an indicator of a site built by people who have never managed a site much bigger than a sub 1 million dollar company's web site (a company where the website is the company that is).
But like any halfway workable language. It seems to work fine for basic, data in and out on a website type drudgery. Thus it won't just die as there are no doubt many 30 year olds with a decade of Ruby under their belts who will insist on using their singular hammer for the rest of their careers. VB is still a thing too.
With an industry perspective like that, I can see why Ruby is on the Ropes.