True, UDE and UDE2 are the exploits that make all others nearly obsolete. However, they are not useless. I had a friend who wanted to just watch movies on his XBox, and a little emulation. However, he still wanted to play XBox Live. And, he didn't want to go through the hassle of an EvoX script, he just wanted to click on like and make it work. So, I installed the Easter Egg exploit, and he's perfectly content about that.
Each exploit has a purpose that is still valid today, except MAYBE the original font exploits, which are redundant.
-Sarge