> cheap buck from 40~80V to e.g. 5V. That’s not a cheap buck lol. Order of magnitude more expensive then 12v not even mentioning capacitors that can withstand

> cheap buck from 40~80V to e.g. 5V. That’s not a cheap buck lol. Order of magnitude more expensive then 12v not even mentioning capacitors that can withstand 80v is $$$ and your derating goes to shit