One, Terminal on Mac is extremely useful, even if the Page Up/Down keys don't work.
Second, those keys do what I expect in Terminal right now on my Mac, and I've done nothing special to get them working.
Third, Mac does come with curl preinstalled, which fits a very similar tool niche to wget.
In general, it is true that there are some Linux-centric tools and packages that currently don't build easily or have preexisting binary ports for Mac, however, that's true in reverse as well. And I can assure you that Mac provides a much more Linux-like experience in a terminal than MS Windows. Also, keep in mind, that with many of the software packages in the Open Source world, it's up to individual people to do the work to get a particular package working perfectly on a particular platform permutation. Nobody "owes" you anything, or guarantees any particular permutation will be perfect. Therefore, while there might be 1000's of libraries and applications that do work perfectly and have equal availability on Linux and Mac, it may not be wise to assume that everything will be, and then cite any specific imperfection as "bizarre" or spectacular failure. It's just software, it's very complex, and if nobody has come before you to smooth that particular cow path then it won't be smooth unless you yourself do the smoothing. :)
