It seems like the new column formatting JSON-based solution is much more inferior in comparison to the old client-side rendering with JSLink. I am mostly talking about dev experience.
For example, for the last few years, I've been using an amazing Cisar Chrome extension (credits to AndrewMarkeev) that allows us to write and preview the results live, as we type.
Is there some tool you know of that allows us to write these ugly JSON-based "formulas" for the modern UI?