Why not support the company that actually supports the development of ZFS instead? I don't know anything about Qnap but FreeNAS has a wealth of robust functionality. I'd be curious as to why people would prefer Qnap?
Well if they actually does anything consumer like Synology and Qnap, ASUStor or TerraMaster I would have bought one immediately. But iXysystem hasn't done it for the past 10 years.