I have four Google accounts and in two of them I use Docs regularly. But I can't switch accounts in Google Docs (in Drive I can):
As you can see, all other accounts are disabled. On some pages it tells me I must sign out of other accounts first:
Unavailable unless you sign out of all other Google Accounts and then sign in to this one. Other options
Why? Is there a way to avoid logging out of all other accounts? I can't use incognito mode since I use two-factor authentication.