Mercedes is already leaving Formula E: is it the right decision?
After just three seasons
Mercedes-EQ have just announced the team will be leaving Formula E at the end of Season 8 (2022). Audi and BMW will also leave, and all three teams have essentially said they're leaving because for better or worse, taking part in Formula E served its purpose in terms of R&D and there's no point staying.
It should be noted that the upcoming 8th season will be the last championship with the Gen 2 cars, which will be replaced by Gen 3 cars in 2023, which means all the teams that are staying will have to devote resources and time to develop the new cars.
Mercedes unofficially entered Formula E in Season 5 with HWA but they only officially began competing in Formula in Season 6, during which they've won a race (with Stoffel Vandoorne in Berlin) and ended 3rd in the constructors' championship. This year (Season 7), they've won both the drivers' championship with Nyck De Vries as well as the constructors' championship.
They came, they saw, they won, they left.