6. Complexity
- In order to solve problems of a certain complexity you need tools with 
    a certain minimum functionality, which results in a certain minimum 
    complexity of those tools themselves.
 - With TeX you have a very powerful system, which is a little more 
    complex than other systems, like word-processors.
    You just can't have it both ways, that is, a very simple system doing a
    lot of things well.
 - Steep learning curve.
 - Harder to do easy things but easier to do hard things!