I read that Duplicati is also in beta (for years now), and that really seems discouraging. Restic looks great, but it's also 0.14 as of the moment. Would you consider restic a stable product, despite the version number?
Restic's versioning doesn't denote that it's not production-ready: it absolutely is. Stable, reliable and developed thoughtfully, with data integrity and security in mind. I highly recommend it.
Could you provide your reasoning for the switch? I've had good enough luck with duplicacy but I'm curious about it vs restic now that restic supports compression.
Yes, it's stable. They even added compression this year. We just added support for Restic on BorgBase.com. Will have more user feedback in a few months, but first tests and benchmarks are pretty encouraging.