Why did this small book, The Haggada for Passover, become one of the most written and printed books?

After the destruction of the second Temple in Jerusalem, the synagogue became the בית כנסת = the gathering house, and later as a prayer house. In tractate SUCCA 51, 2, there is a description of the synagogue in Alexandria.
[…] Some kind of a large Basilica […] and a wooden podium in its center, and the CHAZAN = reader of the assembly standing on it and pieces of cloth in his hand. When he reached the place to say AMEN, he waves the cloth and the congregation say AMEN.
It was a large Basilica and the congregation could not hear the reader, therefore he had to give them a sign with the cloth when reaching the point to say AMEN. The individuals had no prayer books, as it was a large and heavy book, written by hand on parchment. At the beginning as a scroll and later cut into pagers and bound, and later handwritten on paper. All this before the invention of the printing press. We have the Nurenberg MACHZOR (it included prayers for the whole year), dated 1331 with 1024 pages measuring 37×50 cm. Its weight is 27 Kg.
Passover eve is celebrated at home, with family and sometimes friends. This small book, the HAGGADA for Passover = Haggada Shel Pesach, had to be in each home, and sometimes each participant had his own book. It was a family book, private, not one to be taken to the synagogue. A small book that the family could afford to own. As it was a family book, the rich had it richly decorated. Each one a unique, handwritten and decorated. Unfortunately, the Holy Inquisition burned down most of them. The ones that survived were taken away from the Jews when they were expelled from Spain and later Portugal and burned. Only a few of them survived. Illuminated Haggadot we find also in Central Europe.
The Ashkenazi custom is not to eat pulses – legumes on Passover, including beans. As coffee is a product of coffee beans, they did not drink it on Passover. A ruling was passed in 1932 that coffee and cocoa beans are not pulses, but grow on trees; Ashkenazi Jews could consume them on Passover. A bright idea was passed to Maxwell House Coffee and they printed a Haggada to be distributed to their clients.
The Maxwell House Haggada was reprinted yearly, and was used at the SEDER table in the White House. (see the history: https://forward.com/schmooze/173621/101-years-of-the-maxwell-house-haggadah/) and https://hoboken.pastperfectonline.com/…/5B7C8D6D-8AE4-4EBE-8BAE-3…

2012 Display of Maxwell House Haggadot in the White House can be seen here:
https://jewishstandard.timesofisrael.com/maxwells-golden-haggadah/

There were also Political Haggadot. In Arthur Szyk’s Haggada the four sons. In 1934 he could not find a printer in Poland who would print the wicked son. He found an English printer who agreed to print it in 1939. CC BY-SA 4.0 File:Arthur Szyk (1894-1951). The Haggadah. The Four Sons (1934), Łódź, Poland.jpg

Happy Passover to all of you.