Can anyone say why DB disk space is so expensive compared to just a volume? Tempted to just roll my own with these prices.
Addon disk pricing is the same as our volume pricing for services.
The disks are SSDs. We've added a margin on-top of GCP, EC2 and Azure SSD pricing so I wouldn't say they are expensive in comparison to other providers.
It's possible to configure HDD storage which is much cheaper, would be happy to enable that feature flag for you. SSD $0.30 per GB, HDD $0.15 per GB. We'll add HDD pricing to the site and start to enable it by default for everyone.