Title: Given the very interesting comments on the &quot;Ask HN: What is the most impactful thing you&#x27;ve built?&quot;, I was wondering about something similar: Things you regret based on ethical implications, bad technical decisions you made convinced you were right but regret&#x2F;cringe about later, failures on miscalculations on budgets that provoked a bad outcome in the company etc whatever.<p>Thanks in advance.
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