Thanks @aviatoreb. Good stuff.
Cirrus obviously had to overcome some engineering challenges with the BRS In the SF50, particularly given higher speeds, higher altitudes, and a pressure vessel (not to mention the gear). But I assume that having a fully integrated system makes a lot of that easier - a complex workflow that's largely driven by (and tunable with) software.
An emergency handle with a gear interlink seems solvable, and a seat redesign seems well within scope - especially if we're talking purely about new aircraft and not retrofits.
Given the low SEP production numbers for everyone but Cirrus, it almost feels like there's a business opportunity for a third party manufacturing firm to produce aircraft on demand. One that's capable of carbon fiber work as well as metal and rivets. They make an airplane for any company that sells one.