As a paying subscriber I love this move for the .NET community. As a .NET dev for many years, I've noticed there have been periods of time where either Visual Studio or Rider was far better than the other. Currently, Rider is much better. Hopefully this encourages more people to try out C# & F#. Both fantastic languages. - Edit - Looks like Webstorm (JS/TS editor) is also free now.
I use Visual Studio from work and personally subscribe to JetBrains. For those developing commercial software on a budget, Visual Studio Code is an excellent option. Although it lacks some features of JetBrains and Microsoft tools, pairing the .NET CLI with VS Code can still deliver impressive results. if you can afford $10 monthly, integrating GitHub Copilot with VS Code can elevate it to a fancy, lightweight IDE
For advanced scenarios Rider still rules, and this change is a very welcome one. I hope it will help with promoting .NET as the first choice where teams historically picked Go (which is worse).