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Or the tweeter is smart enough to realise a likely origin of the limitation and uses that directly.

Considering the tweeter in question, I'd go with the second one.

Except I doubt it's a bit math bug, or the warning would be very clear about 16, 32, 64 axle trains etc

It's likely that the axle count is stored as a 8-bit unsigned integer.

> Except I doubt it's a bit math bug

What are you even talking about?

> It's likely that the axle count is stored as a 8-bit unsigned integer.

Which is exactly the point of writing it as 2^8…

Somehow I read the original tweet as "by powers of 2" and not 2 to the 8th.

I blame my lack of morning coffee :)

I think the author was just suggesting this is due to 256 causing an 8 bit unsigned integer to overflow.

2⁸?

See? It still takes three characters.