Yeah I hear you. I much prefer staying on stable for that reason. Sometimes (though much more rarely than non-Rust users seem to think) it is unavoidable though, and once you do go into nightly, you can kinda go two ways:

* only use what is absolutely necessary

* go wild and add tons of stuff

As well as there being two kinds of nightly features:

* stuff that's not stable but has a clear path to becoming stable on some time frame

* stuff that's not stable but who knows when that will change, it may never

And to me, this dependency feels kinda closer to choosing the first option from both lists, which is the most conservative way of using nightly.