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ripgrep
ripgrep recursively searches directories for a regex pattern while respecting your gitignore
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
In case you haven't seen it yet, there is a very long discussion surrounding MSRV policy of the libc crate on rust-langs github repo. It's about a library, not a binary, but I think there's a lot of information in the thread, some of which will also apply to binaries.
For binaries, I always track the latest version of Rust. A while ago, I even asked distro packagers what I should do and all were on board with that policy: https://github.com/BurntSushi/ripgrep/issues/1019