Simply closing and later deleting questions in a mass, instead of migrating them, is simply barbarism. Especially doing it retroactively.
Why a migration path to webapps SE doesn't exist?
Extension #1: @EEAA noted vast majority of such questions are scrap. But
- not all of them
- then close & destroy the questions because they are scrap, and not because they would be offtopic!
Extension #2: @mesagoleh noted, questions older as 60 days can't be migrated. Well, it is because you are now applying a newly invented rule retroactively! What are you doing now, is brainless destruction!