You can see many non-working things here: http://laptop.bsdgroup.de/freebsd/ from no sound to can't boot. Power management is also notoriously bad so you need your laptop to be plugged in.
It is reminiscent of Linux a few years ago when everyone with brand new laptops tried to install it.
FreeBSD is still fine on desktop systems and even works quite well for a desktop in some cases, but Linux is just so big at this point that it supports more things, while FreeBSD has always seemed more server oriented.