Will changing phone storage to EXT4 filesystem cause issues?

Question

I've found out about the journaling features of EXT4.Will they prevent data loss if the usb cable gets unconnected?(the usb port doesn't hold cable well)

I've also seen a few benchmarks and EXT4 seems to be generally the fastest except in specific use case scenarios.

Will changing phone storage to EXT4 filesystem cause issues? (I want to do this with removable sdcard as well)

I have Android 4.4.2 FWIW