Comment by @jeanayala • Hey

i was referring to how to control unexpected behavior for me you have two options, or to flatten the contract having a emergency break function or to use

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I see now, thanks for the explanations! In complex systems upgreadeability is too handy to not use it. Besides, if other contracts depend on your system, you can't just deploy new contracts because you have to update the docs and notify other developers about the new addresses. This is the case with many projects that I've audited. As always, different tools in different situations.