Updated does not imply better, only newer. I am not going to say it is 'better' since Baha'u'llah warned us not to consider any revelation from God better than any other, since they were all ordained by God and are a reflection of God's Will and Purpose.
God certainly works in mysterious days. I like to think that the idea of God is always ongoing, regardless if a "Manifestation", as you call it, is alive or not. I believe all people are Manifestations of God in some way, all composed of the same atoms that were here from the start of the Big Bang. And before that all parts of larger multiverse. (And so on until we realize that part of God is The Omniverse - the other two forces being entropy and extropy, existing forever, always expanding the horizons of nature.)
However, it makes sense to me that religion needs to be renewed after it has fulfilled its purpose. Someday in the future the Baha'i Faith will be renewed, after it has fulfilled its purpose, and God will send another Messenger to establish another religion.
After global peace and unity are established, the final piece of human's divine will, before we get to work on the Kardashev Scale several hundred years from now. If I were alive at that point I could have pointed that out and become your next Messenger! I was born too early.
Maybe Nikolai Kardashev is really the next messenger from God...
I use Windows 10, but I hung onto Windows 7 as long as I could. However, once I started using Windows 10, I learned to like it and I now like it better than Windows 7. The same thing happened when I had to go from Windows XP to Windows 7.
Most people like the updates to computer operating systems but they do not like the updates to religions.
Why do you think that is?
Updates to religion takes hundreds, if not thousands of years to happen, and often people mistake the signs. The Jews, except the Messianics, don't believe Jesus is Christ. In fact, in a poll taken by the Jews, more Jews actually believe you can be an atheist than can believe in Jesus as Christ. Imagine if you were using Windows 10 (Judaism) for 2,000 years and someone told you that you had to use Windows 11 (Christianity) after that. The change in religion is slow because most people are very skeptical of those changes. Many Jews still believe a Christ-like figure will come eventually but have put so much barriers into how that can happen that it's virtually impossible to happen again.
The Muslims that eventually converted into Baha'is saw signs that other people in the religion didn't see. These signs can be apparent to many people yet many people are blind to such changes going on. I do realize however that there isn't really that much difference between peaceful Islam and Baha'i, they do share many similarities in fact. Baha'u'llah was Muslim for a good portion of his ilfe, and correct me if I'm wrong, I believe the descendants he has that are still alive now have gone back to Islam too.
Sometimes what one person sees as evidence for something is not what other people see. Take JWs and LDS members. They are very firm in their beliefs, the JWs believing that only 144,000 people will go to Heaven, the LDS believing in three different tiers of Heaven for all to enjoy.
Sometimes when I really think about it, it just all sounds made up to me. And Baha'u'llah believed that each and every Baha'i had their own personal investigation of truth to attend to. The only thing that binds all of them is the divinity of the Manifestations. I agree! The Manifestations are divine! But so is everybody, and everything else too. I do not claim that certain people hold more truths than others, and see to it that the personal investigation of truth he was referring to partakes to all questions of divinity, not just everyday life. Baha'u'llah was unique for the fact that it had a lot of time to write thousands of passages that he claimed was part of God's will. But Baha'u'llah's divinity rests on the idea of the Bab, which rests on the idea of 12th Imam Muslim teachings. That's a sect of a sect. And Islam was around for over a thousand years before the incarnation of the messenger came back.
Would you be willing to change from Windows 10 (Islam) to Windows 11 (the Baha'i Faith), if you and your family were using it for over a thousand years, and would be labeled as an apostate and killed in some countries if you admitted to it? Most (alive) people wouldn't, unfortunately.