One of the common "selling points" I see used as "must have" reasons for owning commentary sets, is that they are based on the "the best" and/or "most recently discovered" ancient manuscripts. Sometimes it's implied, and other times it's explicitly stated, that this results in better/more accurate commentary content.
While reading this common claim again this week for a commentary set I was considering, it occurred to me that I'm not aware of any major manuscript finds since the Dead Sea scrolls, nor am I aware of any manuscript discoveries in the last 40-50 years that would necessarily call into question or challenge commentaries produced since the mid 1960s to mid 1970s because the newer manuscripts weren't available when those commentaries were produced.
Have there been major manuscript finds within the last 40-50 years that result in significant challenges to commentaries produced between say, 1970 and 2010? If so, can you please mention what they are and/or provide any links to articles about these finds and/or the challenges they provide to the content of commentaries produced in that 1970-2010 time-frame because the manuscripts weren't available when the commentaries were produced?