Castle Phoenix air ESC firmware question

[nativepaul]

What does it matter? If the old firmware works fine keep it.
I have had several anomilies like that after upgrading firmware on different devices, so I am now a great believer in " if it aint broke, dont fix it." something needs to have a really fantastic new feature for me to consider upgrading, doing what it has always done a bit better does not cut it for me.