I am a long time user of Proton (5+ years, Unlimited user) services. I am also a long time user of 1Password (since 2016). Understandably I have hundreds of items currently in my 1Password account, and a safe work flow on my devices with that.
Would it make sense to start moving those entries to Proton Pass (as it is included) and be off a bit cheaper, or keep them separated as to not throw all the eggs in the Proton basket?
I am a Proton and 1Password user. For now, I still prefer 1Password over ProtonPass. The only thing really keeping me from fully adopting ProtonPass is the lack of a Linux client (last I checked) and the excellent 2FA integration that was recently added to 1Password. Last I checked, Proton does not have that yet.
You are correct. I just check and the current web version now includes TOTP (2FA secret key) support. I am not sure if passkey support is there or if this functionality is available on all platforms, but it looks like the delta between 1Password and ProtonPass is becoming near insignificant.