Re: "with the chance to enable disk encryption"
"As with Linux, whole disk crypto is built in and can be enabled without having to resort to reformatting or the installation of external software - and people don't even have to interrupt their work to wait for the conversion to take place."
As with Windows too, Bitlocker has been doing this since Vista. However unlike with Windows, on a Mac it is impossible to connect to a wifi network at the logon screen when you have encryption enabled. So forget logging into a directory account on a macbook with full disk encryption enabled.