DevOps
Observability isn't a luxury: it's what prevents 3 hours of production firefighting
When something breaks in production at 2am, the difference between fixing it in 10 minutes or 3 hours almost always comes down to one thing: did you have real visibility into what was happening, or were you guessing from scattered logs?
Observability isn't about having pretty dashboards, it's about being able to answer "what changed, where, and why" without waking up three different people to piece together what happened. Teams that invest in this early spend far less time firefighting and far more time evolving the product.
Investing in observability doesn't mean buying the most expensive tool on the market, it means deciding, from the start of the project, which questions you'll need to answer when something goes wrong, and instrumenting the system so those answers are already there when you need them.