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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.
Maybe they are not "bad" for what they are, but they are certainly full of bugs https://github.com/kaloz/mwlwifi/issues and most importantly development has been dead for years https://github.com/kaloz/mwlwifi/commits/master . So if you got one and it works as is (maybe depends on region or luck?) fine I guess, just don't ever expect new features or improvements to that. For someone buying new for OpenWRT I wouldn't recommend getting a dead-end device.
NOTE:
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Hence, a higher number means a more popular project.