Earlier quoted context omitted.
Firm agree on mixing work/personal contexts. However, in practice, using "Sign in with Google" by default dramatically increases resilience to most failure modes for almost everyone without a sophisticated threat model. > To save what? An additional password? The average person does not manage their passwords in a sophisticated way; if someone is signing up for many different services, they are probably using the sam…
Using Google SSO is fine unless Google arbitrarily closes your account with no recourse.
But I suspect that for the average consumer - people using their gmail to send and receive emails, and doing stuff like watching Youtube and installing Android apps - the odds of that are quite small, especially if they don't have a business or developer context associated with their personal gmail. Account loss/takeover due to password re-use is a much bigger threat for the average person.