Engineers just end up performing the tests manually and with each release. Or they don't and it blows up somewhere down the road. Some open source projects I'v

Engineers just end up performing the tests manually and with each release. Or they don't and it blows up somewhere down the road. Some open source projects I've seen don't have too many tests. IIRC the source for uBlock Origin doesn't have too many tests in it. But it's small enough that a motivated maintainer can keep the quality high. For what it's worth, I worked at a Fintech company that built trading systems for the FX marketplace. They had automated tests out the wazoo and a super thorough and on-the-ball QA team. YMMV. I'm curious, for the projects you worked on in the Fintech space, how much money could be lost due to software glitches? At this firm I worked for they were responsible for the gain/loss if a bug caused a trade to go into an error state. So it could easily cost ten to hundreds of thousands of dollars in a few minutes during market volatility. A friend of mine had a bug slip into prod and it cost the company $90k.