I’m also a somewhat old school C# dev and the main reason I don’t use top level statements is that they only work in a single file of an application, so that single file is different from every other file in your solution.

It’s okay if you’re only writing a single file, and it really seems intended for beginners or micro applications, but for those of us writing anything besides the most trivial, it’s merely “cute” and just adds inconsistency.