[*]I did vote for the answer myself. As aegis pointed out, the question wasn't about not supporting exFAT, but about adding open source alternatives. There was no question about not supporting exFAT, because Jolla had already announced it (whether it was good or bad) so there was no coming back. I voted for that question because it would be nice to offer a btrfs alternative, while still supporting the standard for regular people who don't care about open source, just about working solutions.
Support SDHC (up to 32GB, no exFAT licensing). With a user installable package, support: * >32 GB formatted with btrfs, and optional LUKS encryption. * If possible, paid-for exFAT license package to support SDXC.
So be careful before jumping to conclusions about people who have voted for the "btrfs+optional exFAT" answer.