2.1 billion (2^31 = 2147483648) - limit of auto incrementing integer primary key in sql store https://twitter.com/sarahmei/status/1348474968527360001?s=20
2^128 - uuid's limit
uptime https://uptime.is/99.99
- 99.99% - 50 minutes a year
- 99.999% - 5 minutes a year