Forget about «Save as...» dialog. No need to think about where to save, everything will be saved current project folder automatically.
No need to browse through hierarchy of folders. There is only one place to care about - your current project folder. At any moment it is only one click away from you.
1Activity reminds you about the thing you're working on by showing the name of the current project in menubar. Say no to distractions, say yes to mindful productive work.