So you got lucky. But what you need to do is step outside of your anecdotal personal experience and look into how ext2 works, how ext3/4 actually differ from it, the concepts of clean vs unclean shutdown, how Android works (especially with abrupt process termination being the norm as well as Android's power-down methodology) and how mixing it all together makes ext2 an extremely unwise choice for Android phones. Not worth sacrificing reliability and data-integrity for speed. And who wants to have to run fsck every time they boot their Android phone?
ext2 is approaching 20 years old now, and since then much has been learned about good practices and better safety of data and filesystem integrity, and how to manage various problem scenarios. If you're going to use ext2 you might as well use an Apple Newton instead of Android since they're from the same time period. Switching from ext4 to ext2 to get a faster phone is like ditching airbags, seatbelts, anti-lock brakes, bumpers, crumple zones, and all the reinforcement steel in the frame in order to get lighter, cheaper and faster cars.
There's a good reason the guy who made the Voodoo lagfix is anti-ext2 and refused to make a version that supported it. Unfortunately the phone-ricers at XDA loved to flame him more than listen to common sense... if they can get higher quadrant scores by risking bricking their phone, they don't care.
As I've said before: Just because you've pulled the trigger 10 times and not died doesn't make Russian Roulette a safe game. Look at the reality, not your personal experience.