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Artemis II Astronauts Have ‘Two Microsoft Outlooks’ and Neither Work
(www.404media.co)
This is a most excellent place for technology news and articles.
The tablets are a convenience, not a requirement and so being commercial off the shelf means it's cheaper and it works well enough than what purpose-built hardware and software.
If every tablet died, the mission would proceed without pause. Except the astronauts would be checking gauges instead of looking at a system monitor on their tablet and not sending as many e-mails.