Happy anniversary!
Cake Wallet has made Monero accessible to so many more people and is my mobile wallet of choice. Your passion for Monero shows, hopefully Cake Wallet and Monero will keep improving and bring cheap, trust-less, private payments to even more people.
I'm no expert, but I don't know if I agree with the premise that Linux desktop is secure via obscurity. Linux is probably the largest effort to create a secure OS, and the Linux desktop benefits greatly from that effort.
OpenBSD has an excellent security track record and is regularly updated, I'm not sure if I believe that its security is "outdated."