Does Android support the EXT (filesystem) for removable storage cards? As the subject indicates, does Android support any of the Extended File Systems ("ext", "ext2", "ext3" and "ext4") for removable storage cards (such as Micro SDXC storage cards)?

Android is a Linux-based operating system, so surely such filesystems would be supported?

My question relates to both Android 4.4-4.4.4 ("KitKat") and Android 5.0-5.1.1 ("Lollipop"), as I am just about to buy the Sony Xperia Z Ultra which runs the former, but has an upgrade available for "Lollipop"...

The reason I ask is because Extended File Systems have a number of distinct advantages over Microsoft filesystems, and I do not use Microsoft Windows-based operating systems at all (well, at work I do - but personal stuff can't be used with their computers...), so it's only logical to utilize Extended Filesystems where possible, for the technical advantages.
Yes it does support ext4 from what I gather from other sites and I am doing it right now on my own card.