https://www.pcgamer.com/metro-publisher-says-pc-at-heart-of-plans-for-future-of-series-following-boycott-controversy/

The publisher of Metro Exodus has insisted that PC remains "at the heart" of the future of the franchise, after a member of the 4A Games development team warned that the next Metro games wouldn't come to PC if fans boycotted the upcoming Epic Games Store release.

The individual developer posted the warning on the Russian Gameinator forums after fans—reacting to the decision to make Metro Exodus an Epic Games Store exclusive—started review bombing the series on Steam. The developer was writing in Russian, but the post roughly translates as a warning that if fans refuse to play Exodus on the Epic Store, then the next Metro game wouldn't make it to PC. You can read their post here (right click in the page to translate).