I almost find it suspicious how heavily Tails is promoted over Whonix. Tails focuses on largely imaginary scenarios that only happen to people named Bob or Alice, while Whonix fixes the actual attacks that come up in subpoenas.
The most obvious concern is the RAM-usage (because of tmpfs and each VM having allocated RAM on top of that) and if disk-usage between the gateway and workstation images could be de-duplicated to save space in the live-image.