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Sanaa manuscript

Wikipedia's first sentence called it “one of the oldest quranic manuscripts in existence”. Today it says “one of the oldest quranic manuscripts in existence and is important for textual criticism in quranic studies”.
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The opening as it read in October 6, 2023

Early Quranic palimpsest This article is about Quran.1 Recto side of the Stanford '07 folio. The upper text covers Quran 2 ( al-Baqarah ), verses 265–271.2 The lower text of the above folio, recovered through X-Ray Fluorescence Imaging at Stanford University. The lower text covers Quran 2:191 -196. The Sanaa palimpsest (also Ṣanʽā’ 1 or DAM 01-27.1 ) or Sanaa Quran is one of the oldest Quranic manuscripts in existence. Part of a sizable cache of Quranic and non-Quranic fragments discovered in Yemen during a 1972 restoration of the Great Mosque of Sanaa , the manuscript was identified as a palimpsest Quran in 1981 as it is written on parchment and comprises two layers of text. The upper text largely conforms to the standard 'Uthmanic' Quran in text and in the standard order of chapters ( suwar , singular sūrah ), whereas the lower text (the original text that was erased and written over by the upper text, but can still be read with the help of ultraviolet light and computer processing) contains many variations from the standard text, and the sequence of its chapters corresponds to no known Quranic order.3 A partial reconstruction of the lower text was published in 2012, and a reconstruction of the legible portions of both lower and upper texts of the 38 folios in the Sana'a House of Manuscripts was published in 2017 utilising post-processed digital images of the lower text. A radiocarbon analysis has dated the parchment of one of the detached leaves sold at auction, and hence its lower text, to between 578 CE (44 BH ) and 669 CE (49 AH ) with a 95% accuracy. The earliest leaves have been tested at three laboratories and dated to 388-535 CE.

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Today
Wikipedia's first sentence called it “one of the oldest quranic manuscripts in existence”. Today it says “one of the oldest quranic manuscripts in existence and is important for textual criticism in quranic studies”. Read the current article and compare.
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Then

one of the oldest quranic manuscripts in existence

Now

one of the oldest quranic manuscripts in existence and is important for textual criticism in quranic studies

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