Its not uncommon in computer systems conferences to see rejects based on comments about the system not having practical application or being too non-practical.

Its not uncommon in computer systems conferences to see rejects based on comments about the system not having practical application or being too non-practical. Oddly enough, it is not too uncommon to see papers getting one review rejecting the paper because it is not practical enough and another review (for the same paper) rejecting the paper because it is too practical :P