The dream of a simple button is dead. But the content is not lost to the void. Here is your actionable strategy:
If you encounter issues during the DLC download process, here are some troubleshooting steps: forza horizon 1 dlc download
The Rally Expansion was not included in the Season Pass. It was a separate purchase. The dream of a simple button is dead
No. Absolutely not. The store pages are permanently removed. you’re mostly out of luck.
You cannot buy new FH1 DLC from the Xbox Marketplace anymore. All delistings happened years ago. If you didn’t grab the Season Pass or individual packs before ~2016, you’re mostly out of luck.