I dont know where you get your information Forza may be a franchise that has it's origin on XBOX, but fact is, since Battlefield 4 they have ALL used Frostbite 3, along with many other games from EA during that period. All the games have differing levels of stability and that comes down to the developer. Frostbite, Unreal engine, Cryengine and Unity are all native to PC and are only used to maximum effect on a PC. PC's have scaleable settings you can use to enable slower machines to run everything smoothly, if at all and low to medium, in essence, is usually the console version. So Battlefield V and Forza 4 are using identical code routines at their core, as do FIFA, Madden, Battlefront and much more. I Have and i5 6600k CPU, 16GB DDR4 RAM, 4 SSD's Running in RAID 0, an Nvidia 1080 GTX which can run everything at 4k 30-120fps and Frostbite hasn't CTD since the last Forza. It Microsoft's store DRM. 100%.
