If my memory serves correctly, the same limits for storage and # of connections were in place before for the non-dev databases (starting with 50$). I don't really care for the connections, but a 64 GB storage limit can quickly become a problem for some apps, while 400MB of RAM is perfectly fine to serve the hot data...
Edit: To put this into perspective: If an app would generate 400MB of data per day (the last 24 hours would fit into the cache completely!), the app would run out of storage after 160 days...
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I just had a look at the updated pricing.
If my memory serves correctly, the same limits for storage and # of connections were in place before for the non-dev databases (starting with 50$). I don't really care for the connections, but a 64 GB storage limit can quickly become a problem for some apps, while 400MB of RAM is perfectly fine to serve the hot data...
Edit: To put this into perspective: If an app would generate 400MB of data per day (the last 24 hours would fit into the cache completely!), the app would run out of storage after 160 days...