[temp51723]

You pick a version of the compiler and stick with it until you're ready to try a newer version?

[ubercore]

That ignores any other libraries you use which may not make the same choice as you.

[temp51723]

It doesn't. You stick to the version of those libraries at work with that version of the compiler- like every other language.

[kzrdude]

Then you risk missing the deprecation warnings and head straight into errors.