docs, Setting Up page, explain why the cargo installs are pinned?

[sprive]

Following Setting Up page, the tools versions are specified in pinned fashion..
Example:

...
$ cargo install cargo-binutils --vers 0.3.3

$ cargo size --version
cargo-size 0.3.3

Are these pins required, and if so: for what reason? the latest version is .3.6 for example.

[BartMassey]

Those are the versions we successfully used when this was written. Check out https://github.com/rust-embedded/discovery-mb2 for the more recent version of the book, which has more recent versions of the dependencies. You're right that some text would be good there.

[sprive]

Awesome. That pointer helps (I had the newer v2 micro:bit, but I stumbled into the older guide). TY.