Truespace surely isn't the easiest software package to learn, but I would not call it outdated. The last version has the disadvantage that it's a hybrid between the new and the old Truespace - which does not help learning it. 

A sad thing that Microsoft just bought it to slaughter it. 

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

Avatar image of me done by Chidori.