Puppy is not a normal Linux OPS.
A lot of stuff is done the Puppy way.
So, by your reasoning.
The more you use a format the buggier it will be
Could it be that ext3 has been around, long enough, for most all of the bugs have been fixed.
Nothing new to find!!
Limitations
In 2008, the principal developer of the ext3 and ext4 file systems, Theodore Ts'o, stated that although ext4 has improved features, it is not a major advance, it uses old technology, and is a stop-gap.