I don't write Ruby, but I write Go and C, and C++ and I was left facing a new license. For no reason at all. It's the same debugger and the same code base, you just need to hook into gdb or lldb instead of all the other ones.
Like I said it's only one of the problems, read the rest.
It can do Go.
Only ones that it can't is C/C++ (probably because that started as Apple only IDE) and .NET (that started as extension for Visual Studio).
They started Fleet that can do all of them, as a response for VS Code. But then came AI and Cursor probably took a large chunk of their users. So they redirected resources (like Zed that paused their collaborative features to focus on AI). There is currently a closed EAP for Cursor like ide based on Fleet. And their Git client as separate app.
The paid version of Intellij has never lost anything. Pretty much everything the specialized IDEs can do, Intellij can do too, though maybe some features lag. CLion, Rubymine etc are just less expensive specialized versions.
I'm sure the free version has lost some things.
Its been a long time since I used CLion but it was the best C++ IDE by a huge margin.