Yes, but in the case of both Mozilla and Linux, they had a huge running start and have developed their moats (for what they are) over a long period of time.
A new organization coming in fresh and thinking, "hey I know what, let's fork Chromium", does not seem like a very long lived effort. I also don't see any new operating systems coming out from an unknown team anytime soon.
The open source projects you use as examples are entrenched, and it's going to take a major shakeup and/or cracks in the large organizations for something new in the browser or operating system space to emerge.
A new organization coming in fresh and thinking, "hey I know what, let's fork Chromium", does not seem like a very long lived effort. I also don't see any new operating systems coming out from an unknown team anytime soon.
The open source projects you use as examples are entrenched, and it's going to take a major shakeup and/or cracks in the large organizations for something new in the browser or operating system space to emerge.