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Re:3D metal printing is about to go mainstream by danudey on Monday July 31, 2017 @01:46PM (#14894307)
Well technically, a plethora is a 'large or excessive amount of something', so I think in this case it works, though it feels a little sesquipedalian.

https://en.oxforddictionaries.com/definition/plethora

Re:3D metal printing is about to go mainstream by ClintEhrlich on Monday July 31, 2017 @05:34PM (#14896083)
The entry you linked to agrees with my definition:

"Strictly, a plethora is not just an abundance of something, it is an excessive amount."