As an ex-Gentoo user, the pain in a was always bundled Vs shared libraries.

Shared libraries breaking ABI could mean recompiling half your operating system

On the other hand, bundled libraries meant insanely long build times and a sense of impurity/uncleanliness

Unfortunately, it looks like projects like ABI tracker are long dead:

https://github.com/lvc/abi-tracker

Current Gentoo user here. This hasn't been a real issue for me in years.