Yeah, it kind of works now with Baha'u'llah. He has a message that includes all the people throughout the world. Has any other "manifestation/messenger" ever had a message that did that?
No, no other "manifestation/messenger" ever had a message that abrogated all the dispensations of the past because no other "manifestation/messenger" ever inaugurated an whole new religious cycle, which was the consummation of all the Dispensations that had gone before it.
“A Revelation, hailed as the promise and crowning glory of past ages and centuries, as the consummation of all the Dispensations within the Adamic Cycle, inaugurating an era of at least a thousand years’ duration, and a cycle destined to last no less than five thousand centuries, signalizing the end of the Prophetic Era and the beginning of the Era of Fulfillment, unsurpassed alike in the duration of its Author’s ministry and the fecundity and splendor of His mission—such a Revelation was, as already noted, born amidst the darkness of a subterranean dungeon in Tihrán—an abominable pit that had once served as a reservoir of water for one of the public baths of the city.”
God Passes By, p. 100
It is important to note that it was only the Dispensations of the past that have been abrogated.
“In conclusion of this theme, I feel,
it should be stated that the Revelation identified with Bahá’u’lláh abrogates unconditionally all the Dispensations gone before it, upholds uncompromisingly the eternal verities they enshrine, recognizes firmly and absolutely the Divine origin of their Authors, preserves inviolate the sanctity of their authentic Scriptures, disclaims any intention of lowering the status of their Founders or of abating the spiritual ideals they inculcate, clarifies and correlates their functions, reaffirms their common, their unchangeable and fundamental purpose, reconciles their seemingly divergent claims and doctrines, readily and gratefully recognizes their respective contributions to the gradual unfoldment of one Divine Revelation, unhesitatingly acknowledges itself to be but one link in the chain of continually progressive Revelations, supplements their teachings with such laws and ordinances as conform to the imperative needs, and are dictated by the growing receptivity, of a fast evolving and constantly changing society, and proclaims its readiness and ability to fuse and incorporate the contending sects and factions into which they have fallen into a universal Fellowship, functioning within the framework, and in accordance with the precepts, of a divinely conceived, a world-unifying, a world-redeeming Order.”
God Passes By, p. 100
However, it was
only the former Dispensations that have been abrogated. The religions themselves have not been abrogated.
“Let no one, however, mistake my purpose.
The Revelation, of which Bahá’u’lláh is the source and center, abrogates none of the religions that have preceded it, nor does it attempt, in the slightest degree, to distort their features or to belittle their value. It disclaims any intention of dwarfing any of the Prophets of the past, or of whittling down the eternal verity of their teachings. It can, in no wise, conflict with the spirit that animates their claims, nor does it seek to undermine the basis of any man’s allegiance to their cause. Its declared, its primary purpose is to enable every adherent of these Faiths to obtain a fuller understanding of the religion with which he stands identified, and to acquire a clearer apprehension of its purpose. It is neither eclectic in the presentation of its truths, nor arrogant in the affirmation of its claims. Its teachings revolve around the fundamental principle that religious truth is not absolute but relative, that Divine Revelation is progressive, not final. Unequivocally and without the least reservation it proclaims all established religions to be divine in origin, identical in their aims, complementary in their functions, continuous in their purpose, indispensable in their value to mankind.”
The World Order of Bahá’u’lláh, pp, 57-58
Fundamental Principle of Religious Truth