I've been using Restic for servers, but ended up going with Kopia for machines that are not always on, like laptops. It has the advantage that it will take something of an opportunistic approach where it will start backing up if it hasn't done so in a while, and seems to be able to restart with aplomb if it gets interrupted (machine shutdown or laptop lid closed).
That and being able to have multiple machines writing to a shared repository at the same time is handy. I have the kids' Windows computers both backing up to the same repo to save a bit of storage. (Now if only Kopia supported VSS on Windows without mucking around with dubious scripts.)
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