Airframe systems make sense for a 4-seat Cirrus because it is impractical to carry 4 chutes and get everybody out the door in good order. For single seaters, especially open cockpit, the case for an airframe system is much less persuasive.
The airframe is likely to be toast anyway by the time you have a catastrophic failure or collision that makes the ship uncontrollable, deploy the chute, and hit the ground. You can save a bundle simply by buying a personal emergency chute for yourself, wear it when you fly, jump when/if it suddenly all goes pear shaped, open when you are clear, and simply throw away the aircraft. I have a Strong Paracushion that I like. They don't weigh much and are steerable.