It is interesting to see how various online services react to multiple
user accounts. This is especially important when you keep your work
and personal data and life separate. Consider what email address is
attached to an account, where messages containing data are sent, and
what happens when people move on.
For example I have 3 Google accounts, one personal and two for two
different startups. Google has done a pretty good job - you can login
to all 3 in the web interface and switch between them as needed. Some
of their products don't work (eg Analytics) but the most commonly used
On Android you can register all your accounts with the system and on
the whole things work well, although G+ doesn't support multiple
accounts. Google's apps on iOS don't seem to have multiple user
support at all.
I'm currently dealing with Dropbox who seem completely oblivious to
the problem. Their support is comical over the issue, and they will
lose a paying customer the moment Google Drive works on Linux. Trello
is a great tool, but it too suffers from the only one account problem.
For those of us implementing online services this is another thing to
make sure we get right.