> Why people are wasting many millions of dollars to implement cryptographically-secure electronic signature systems, if a simple thumbs-up emoji is enogh? ;)

People insist on formalities (of all kind) precisely in order to avoid these kind of lawsuits. Paying all those lawyers is not cheap.

> What's next?

It is not like this was some hapless chap who got suckered into a deal. They had a business relationship going on for years and they have agreed on similar deals with not much more than a thumbs up emoji.

> Common Law system is flawed.

What aspect of this story makes you think that?