For any Mac with a drive(s) that is physically removable FV2 is a must; the only real exception being the 12" Retina as the SSD components are mounted directly onto the Logic Board, equally if the stored data is "sensitive" once again FV2 should be implemented, alongside Firmware password and user account password.
Any reduction in performance is highly unlikely to be perceptible on modern Mac`s with fast SSD`s, that said it will be heavily dependant on the systems age and performance. The only way to really see is to try it for yourself, nor would I rely on benchmarks too much, especially the 12" Retina due its new controllers implementation the results will likely be skewed.
On newer faster Mac`s FV2 is not an issue, on older systems with "spinners" a serious consideration, only really impacting startup & shutdown speed. The biggest consideration is what do you personally have to loose...
Q-6
Any reduction in performance is highly unlikely to be perceptible on modern Mac`s with fast SSD`s, that said it will be heavily dependant on the systems age and performance. The only way to really see is to try it for yourself, nor would I rely on benchmarks too much, especially the 12" Retina due its new controllers implementation the results will likely be skewed.
On newer faster Mac`s FV2 is not an issue, on older systems with "spinners" a serious consideration, only really impacting startup & shutdown speed. The biggest consideration is what do you personally have to loose...
Q-6