I don’t use radicle yet, but from what I understand I don’t see how it would change anything connectivity wise for your team. If you have private repos you self host in a company server, radicle would behave exactly the same. You would still not want it exposed publicly and would still need the VPN.
If anything, you could be less safe since a miss configuration would mean Radicle publishing, and potentially many others seeding, your private repos.
What this really boils down to is that Anthropic and OpenAI hope to be the only ones that use someone else’s copyrighted information without any legal or financial complications.