I'm afraid I don't see it that way, sirmaru.

The Reader supports TXT and RTF natively, I don't see any reason to torture myself by reading a large file in one of those formats on a computer monitor.
As mcramer pointed out, the thing does sometimes have issues with really large files in those formats, but converting them to LRF does usually take care of the problem, and it's just not that hard to do.
Certainly I don't see it as a matter of definitive Right or Wrong either way.