Ive only used ruby a handful of times, so my comment might be ignorant. But other than community , what does ruby and ror do better than say elixir & phx, i feel like the latter is leagues ahead simply because nothing can compare to the beam platform for soft real time systems, you have fault tolerance, nifs, actor model , you can have millions of processes running at the same time for cheap, easy to reason about concurrency , fp makes code concise imo, otp, the beam gc doesnt stop the world etc I just think on paper phx is superior thanks to the beam platform
That being said use what you like and hotwire native sounds cool will give it a try. I also think the author of the blog shouldve went a bit deeper with his points
One of the arguments is how noisy the languages are. Elixir is without a doubt more powerful, more scalable and more sophisticated than Ruby.
What Ruby has though is ability to express what you are doing in a clear syntax. Elixir has a lot of ritual (albeit less than erlang) to set up your most used things like GenServer - you don't abstract away the concurrent flow (which is good, concurrency should be obvious), but you also wouldn't write elixir without it, so code inevitably becomes filled with technical concerns.
I'm biased, I write elixir for a living after a decade in Ruby, and I'm happy with that tradeoff. But there are times where you need to do an imperative thing and make it clear as day, and Ruby often does a better job here.
Rails is also somewhat more ergonomic for fast prototyping than phoenix. ActiveRecord is a blessing and curse, it's insanely productive for making things do things in minutes, but lacks composition later on.
That being said use what you like and hotwire native sounds cool will give it a try. I also think the author of the blog shouldve went a bit deeper with his points