Interesting bunch of takes...
Take a look at Dart+Flutter.
Google just laid off those teams so I doubt this is a good thing to learn if you want something useful in the long-term
Ruby is nearly dead nowadays
Demonstrably false. My career has been in the Ruby/Rails world and I just went through a job hunt where I found tons of Ruby positions
JS itself is used rarely, better consider using TS (however I don’t recommend using them for anything other than web frontend)
Full-stack JS/TS is very popular in the web-dev world.
Go is a great language
I disagree, but this is 100% a personal opinion of mine 😄