Like what? All the features that password manager needs to have (and features that 99% of people need) OSS version have it. SSO, organization management etc. is not something that "password manager" needs to have.
Like TOTP, which is part of payed variant and I consider that an essential feature of a password manager in 2022. Don't get me wrong, I am not complaining about that business decision, just answering since you asked.
I totally agree, however there are some low-criticality services where 2FA is a burden and having it in your main password manager app is a tradeoff worth consideration. Definitely NOT your primary email address.