[a2800276]

Don't overrate the skill of writing assembly, sure. But don't underestimate the software craftsmanship. Looking at the code, it's obviously expertly written. I'm not sure if I've ever had the pleasure of working with such a well thought out and documented code base.

And don't underestimate the skill of putting together the entire product: being able to create behavior that is relatably live-like for millions of people on such a limited Plattform may not be Apollo-Level genius but is exceptional nontheless.

[m4rtink]

IMHO the main skill is to cram it to the minimum necessary MCU as not to make the resulting device too expensive.

It would likely be much easier to use a more powerful MCU, at the per unit cost being higher.

[postalrat]

Any fool can do that. It's up to the programmer to salvage the situation.