Opinionated is good. It means everyone gets the same predictable experience and it's easy to set up. On the opposite end of the spectrum you'd have something like IRC, which nobody uses because it's so hard to get started.
If we're just throwing around straw men, then a good example of "opinionated" is websites repeatedly hassling you with CAPTCHA "security checks". They're really concerned that you suffer their exact intended "experience", rather than being able to use your chosen software tools to view/analyze per your own needs.
Open clients/protocols/ecosystems create individual freedom and choices at the edges. One size does not fit all, even if you market it as an "experience".
If we're just throwing around straw men, then a good example of "opinionated" is websites repeatedly hassling you with CAPTCHA "security checks". They're really concerned that you suffer their exact intended "experience", rather than being able to use your chosen software tools to view/analyze per your own needs.
Open clients/protocols/ecosystems create individual freedom and choices at the edges. One size does not fit all, even if you market it as an "experience".