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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.
I'm quite happy with Omnivore: https://github.com/omnivore-app/omnivore
It's open source, I can host it myself it I want to but the reference hosted version on omnivore.app is free and quite reliable. Dark mode, progressive webapp, native apps, full text search, Obsidian integration, Pocket migration.
Compare that with instapaper: Terrible Android app that looks like Android apps from 2015, okayish iPad/iOS apps, quite expensive now, every interesting feature behind a paywall. I guess if you're into the minimalist aesthetic or if you've grown accustomed to it, sure, keep on using it. But it feels as if this product has been somewhat on extended life support and people would care a lot less if it wasn't run by Marco Arment.