Superb. Many open source projects still bounce you to Google Groups for discussion, which is archaic at this point. Even requires Google login just to read threads. Also it's often unclear what the policy is on raising questions in the issues tracker (smaller projects are usually fine with it, bigger projects get overwhelmed and don't want it). This will make it a much nicer separation for everyone and keep the issue…
One thing nice about Google Groups is that you can largely use it to its fullest extent from email.
(We also offer it to open source communities for free as well: https://aether.app/email)