I bought the XBox OneS just for Forza Horizon 3. It was such a jump in gameplay quality that I bough FM6 a week later, bought FM5 2 months later, pre-ordered FM7 (and never regret it), bought all the DLC for all of them, and finally enjoyed FH2 this Summer. Forza is just a ton of fun to play with.
Snap! I also did the same ^^^ I held off for a while as I went to Playstation2 from the XB360. I was thinking it was quite an outlay just for one game but i did really enjoy FH1 and picked up the original Xbox One FM6 + FH3 in a cheap package in 2016) and then this year I upgraded to the One X and have all Forzas including my original disc FH1 from Xbox 360! Now i have the Xbox One X i feel with new releases it is paying off and it is great to see 4K Forza games. I have brought CODWWII & Gears of War in the sales but mainly use it for Forza too.👍 (on Controller no wheel)