Ask HN: Early B2B SaaS without features like SSO, OAuth login, etc.?

Hi. I have been using email login and admin users can invite their colleagues by email address.

Of course, many established companies offer SSO, ability to login using Google, Apple, other oauth.

I asked around to my test users and a few potential users and they mentioned email is fine. In my own experience as a SWE I used many softwares at work which used just email login. However, many more offered a bunch more.

Will it be fine to open it up to broader audience without all these things?