FFLS has no WRITE mode, and for very good reason.  There is no way you can guarantee direct-to-disk writing to a file-system partition isn't going to obliterate the partition, while executing "driver" code under a game environment.  There are simple way too many variables involved.

Superiour knew it, and we know it.

ULS operates under a TOS shell, executing disk IO via the system's boot-driver, in a clean and known environment (Which is why you don't have to re-partition your drives or make dodgy RAW partitions). V3 vastly improves on previous versions as far as speed and memory use are concerned.

Out of our 10 or so "Test Phase" titles, only 1 needs more than 1Mb - And that game needs 1Mb to run anyway (from the original) so a little overhead for ULS can't be blamed for this!

As GGN said the other day, BRACE YOURSELVES, you're going to see some titles coming soon (In fact, several are ready now, we're just awaiting the cracktro for them) with previously impossible to implement features*, all thanks to the ULSv3 core :-)

*One, in particular, aimed directly at STOT participants :)