We at https://hubski.com https://hubski.com use a very hacked version of news.arc. Going on seven years. We moved data to postgres though. The app is top notch

We at https://hubski.com https://hubski.com use a very hacked version of news.arc. Going on seven years. We moved data to postgres though. The app is top notch, but it does not scale very nicely. Too much to hold in memory.