Every other UI framework I worked before and after always left me with the impression that something was lacking, in speed of development, fast iteration, but also in the quality of the abstractions.
WinForms has had a major cleanup over the last few years. Issues with DPI, multiple windows are mostly gone.
You no longer need VS2. vscode on its own is excellent, and you can if you need to, still use VS2 for debugging
(Same applies to AvaloniaUI for cross platform.)
Codex, Claude need guidance if you want something maintainable, otherwise they generate a mess structure wise or reinventing functionality already available in standard controls 'out of the box'.
But people want python ...
Indeed. But I always found WinForms also better for "slow and polished".