Yes, regardless whether RPI1 or 3. These boards are quite weak. I wouldn't want file system to one of the biggest bottlenecks on a running system. I had BRTFS o

Yes, regardless whether RPI1 or 3. These boards are quite weak. I wouldn't want file system to one of the biggest bottlenecks on a running system. I had BRTFS on rpi3 before and don't recommend it. Both FS are CoW.