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> Not even knowing if a upgrade of a dependency breaks your system is just hard.

This is true for any language/platform.

There are massive differences in how much of a problem this is across different platforms.

With Clojure, I can think of 2 times ever when a dependency caused an issue. It was extremely obvious since the issue was "won't compile", and the fixes were simple.

With PHP, I expect any change to potentially break something. Bump your AWS SDK which uses a different minor version of guzzle? Fatal error.

There's a world of difference between breakage being an everyday thing and a true rarity.

Strong typing does partially help in this situation though.

Only for the most trivial bugs, though (as non-dependent type systems can't express anything but trivial properties). Still, it's better than nothing.

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