Depends on where you live. This may be true for US customers but it's definitely not true for EU customers.Shearwater has always had the best customer service in the industry so if that matters to you it's an easy choice.
Do you know why? Is it because of reliability issues? Maybe they just had those SWs laying around. My ccr backup computer is just one of the computers I use for OC dives, I did not specifically pick it to be a backup.Well I know 3 people that have Liberties (of various variations) but use some Shearwater variant as at a backup computer if that gives you an idea of what they think of the Liberty computer.