I've also been using bup to replace (in some areas) my use of rdiff-backup.
It's a great tool, but since you contributed already, I cannot understate the importance of pruning old archives. For online/disk-based backup solutions, space is always going to run out eventually.
I'm using bup where I already know the backup size will grow in a way that I can manage for the next 1-2 years.
For "classical" backup scenarios though, where binaries and many changes are involved and the backup grows by roughly 10-20% a week due to changes alone, I have to resort to tools where I can prune old archives because I would either have to reduce the number of increments (which I don't want to do) or increase the backup space by a factor of 50x (which I practically cannot do either).
It's a great tool, but since you contributed already, I cannot understate the importance of pruning old archives. For online/disk-based backup solutions, space is always going to run out eventually.
I'm using bup where I already know the backup size will grow in a way that I can manage for the next 1-2 years.
For "classical" backup scenarios though, where binaries and many changes are involved and the backup grows by roughly 10-20% a week due to changes alone, I have to resort to tools where I can prune old archives because I would either have to reduce the number of increments (which I don't want to do) or increase the backup space by a factor of 50x (which I practically cannot do either).