[dpc_01234]

Shadowing is a feature. It's very common that given value transforms its shape and previous versions become irrelevant. Keeping old versions under different names would be just confusing. With type system there is no room for accidental misuse. I write Rust professionally for > 2 years, and years before that I was using it my own projects. I don't think shadowing ever backfired on me, while being very ergonomic.

[lnenad]

Depending on which language you are using shadowing could lead to either small issues or catastrophic ones (in the scope of the program). If you have Python and you start with a number but end up with a complex dict this is very different than having one value in Rust and a slightly different value which is enforced by the compiler.