[kortilla]

I think you’re confused a bit, so let’s split apart the use cases to be clear why IPs are bad in both cases.

You said devs and technical staff were typing IPs into their browsers. Presumably this means the address bar, which breaks TLS.

SSH derives a big chunk of security from key caching. If you’re using IPs you now can’t have an IP change without triggering key warnings on the SSH clients for a new key at a minimum or (worst case) a breach.