Please don't remove rsnapshot - it is a far too important package to lose.
IMHO the issue is really minor: rsnapshot is a stable software which had
very few changes over last several years.
Even if unmaintained upstream it will remain usable for years to come.
As a project we are perfectly capable to apply patches here and there, as
required even without upstream support.
Also I'm not aware of any conceptual alternatives to rsnapshot. In a sense
it is a unique software implementing a special (and extraordinary useful)
approach to backups.
Thanks.
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A man who knows a subject thoroughly, a man so soaked in it that he eats
it, sleeps it and dreams it - this man can always teach it with success, no
matter how little he knows of technical pedagogy.
-- H. L. Mencken
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ZERO flu deaths reported during 2020-2021 season. Never in medical history
has an annual disease completely disappeared to be replaced by another one
with the exact same symptoms.