Password manager without question (just make sure it is one with strong security)
SSO to me exists for the sole purpose of keeping you locked into their platform. I have a "professional" email that I previously hosted on google with gsuite. I used that account a few times as SSO.
Now even though I have moved that email off of google, I continue to pay gsuite just so I don't loose access to that account and anything I logged in with it.
I have made every effort to remove google from my life as much as possible, but that account remains thanks to SSO.
Some SSO services don't give you an easy way to change how you login so you could be stuck.
It's a bit of a hack but you should be able to convert that Google account to Google Cloud Identity which is free for up to 50 users. You'll lose gmail, etc. but you'll keep playstore purchases.
SSO to me exists for the sole purpose of keeping you locked into their platform. I have a "professional" email that I previously hosted on google with gsuite. I used that account a few times as SSO.
Now even though I have moved that email off of google, I continue to pay gsuite just so I don't loose access to that account and anything I logged in with it.
I have made every effort to remove google from my life as much as possible, but that account remains thanks to SSO.
Some SSO services don't give you an easy way to change how you login so you could be stuck.