Mercedes stops developing internal combustion engines to focus on electric cars (Update)

For years now AR1.com has said it is time to stick a fork in the internal combustion engine - it's about done.
Stick a fork in Mercedes involvement in F1. It's only a matter of time before it's done.

UPDATE Given this development, how many more years before Mercedes exits F1?

Will it be 3 years? 5 Years? 10 Years?

09/20/19 After reigning in the auto industry as the powertrain of choice for a century, the internal combustion engine is finally dying. Now even Daimler (Mercedes) says that it is stopping development of new internal combustion engines to focus on electric cars.

The German automaker whose namesake, Gottlieb Daimler, is credited for having invented the prototype of the modern gasoline engine recently released its latest generation internal combustion engine and it might be its last.

According to German magazine Auto Motor und Sport, Daimler development chief Markus Schaefer said that they currently have no plans to develop a next-generation combustion engine and they are focusing on new electric powertrains.

As far as pure conversion from energy to motion, electric motors are far more efficient than combustion engines. Electric motors can be as efficient as 98%, with average around 90%. ICE's can be as efficient as 40%, with average around 33%.