The move to cut down the number of architectures supported was discussed during a project meeting in March 2005. The Debian release team agreed that it was not sustainable to continue making coordinated releases for as many architectures as the current version supports.
"This [move] will drastically reduce the architecture coordination required in testing, giving us a more limber release process and (it is hoped) a much shorter release cycle on the order of 12-18 months," said Langasek in an email at the time.
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