Incubation Examples Some are fresh starts, some are followups pf, tmux, security hardening, privilege-separation, privilege-drop, stackghost, OpenSSH, strlcpy/strlcat, arc4random, auditing procedures, stack-protector, OpenBGPD, OpenNTPD, isakmpd, IKEv2, relayd, new resolver, PIE, soft-error ICMP/RST, randomized mmap, randomized malloc, hw.sensors, hundreds more... We invent/adopt new "security ideas", complete & integrate into system, then ship a release to push the idea to maturity. ie. first OS to ship IPSEC, IPv6, crypto, SSH, strong random, stack-protector, other security mitigation methods, ...