We recognized that this work often entails a great deal of effort and produces significant results.
This work creates a noticeable amount of results and often times takes a great amount of effort.
Shuman also makes the totally unsubstantiated (and untrue) claims that there is very little in the way of application software for Linux and that very few people use  The latest estimates of the number of Linux users run into the millions--how can that be so few?