I've been running a rooted OP6 for 3.5 years or more. Currently on stock OOS 11 with some root specific extras. It still behaves OK, but I'm thinking of getting something newer because of occasional issues that may be age related. OP is selling the OP9 for $499 today in the US. For those of you who are familiar with the device, do you think it's worth buying at that price this deep into its existence?