This is true for the challenge of proving that cascading stylesheets are Turing-complete, or that you don’t need all those fancy ISA bits of an ARM processors when you already got the LDM and ...

Turing completeness in blockchain allows for universal computation, enabling diverse applications and smart contracts with limitless computational possibilities.

Scientists have created the first “chemical Turing machine,” meaning a liquid that can do the calculations that define a classic computer science standard.