I meant it as "irrevocably locked in a certain mentality" - in Linux's case, "change for the sake of it, for whatever cost". Combine it with a NIH syndrome and "we are going to reinvent that wheel for the n'th time." (I could read ten+ years old FreeBSD HOWTO and be reasonably sure that whatever I am doing, I am going to get it working. Because changes have been small and incremental. Read 5 years old Ubuntu HOWTO and you'll be stuck in minutes)
Chaotic - It's said that Linux evolves, BSD is engineered. Evolution as a process is inherently chaotic. Fittest will win. So, both, good and bad ideas shall be casted into code and tried out on Linux. Where the viability of each shall be tested on Linux users.. How long would you like to be a lab rat?