Epic/Valve are privately held now, but if you build a team and game series on a proprietary platform, you are at the whim of the platform owner. It might be a

Epic/Valve are privately held now, but if you build a team and game series on a proprietary platform, you are at the whim of the platform owner. It might be a low risk now given they are looking to scoop up teams ditching Unity, but nobody knows what will happen in 2 or 3 years.