Hendzel is wrong about a few of them.

Things I changed my mind on. Newest first.

2026 · 04 · 12

I was wrong about how fast a solo builder can hire AI for ops.

I assumed hooking Claude + n8n up to handle customer email and refunds would 10x my throughput. After six weeks the failure modes — quiet hallucinated refunds, mis-categorized urgent emails — cost more cleanup than the time saved. AI-driven ops needs a human in the loop for at least a year past launch. I was treating it like deterministic software when it's still probabilistic infrastructure.

2026 · 02 · 03

I was wrong about needing co-founders.

For ten years I said you can't ship serious products solo. Then I shipped four in six months alone with AI agents handling everything I used to need a junior engineer for. The advice was right for 2015. It's now actively harmful — it pushes solo builders into bad partnerships when they could be shipping.

2025 · 11 · 18

I was wrong about Polish-first content.

I thought writing in Polish first would build a stronger local moat. It built a smaller audience and made me spend more time on copy. English first, Polish translations on demand, is the right ratio for builders shipping to a global market with Polish ties.

2025 · 09 · 02

I was wrong about over-engineering.

I used to say "ship fast, refactor later." I now think the refactor never comes — the version that ships is the version that lives. Spend an extra two days on data structures and you save six months of regret. Speed is a feature; sloppy isn't.