it's a footgun indeed and no IDE per se doesn't solve all the problems. But since rust was mentioned, there are other rust features that make that less of a pro

it's a footgun indeed and no IDE per se doesn't solve all the problems. But since rust was mentioned, there are other rust features that make that less of a problem: most of the rust code uses immutable variables and only rarely you do use mut variables and mut references and these can be under bigger scrutiny by reviews and linters. I focused on IDEs in my comment because I find shadowing to be a problem even with immutable variables, because it's hard for you to tell what is the type of a variable if it keeps change throughout the function body.