[Lazarus] Why does a project have to be open?

[Jürgen Hestermann]

Sven Barth schrieb:
> Also this is no "feature", it's currently one of the core concepts of 
> Lazarus and it was so for years. So I doubt that this will be changed 
> in the near future (before 1.0 at least).
>
Although I have arranged with it now it annoyed me too. No other program 
(including Free Pascal text mode IDE) forces the user to have a 
file/project open all the time. It's a bit weird that it was designed 
like this. What was the reason for doing this? What advantage does it have?