FYI
RC8 is no longer for sale on Steam. Only RC10 is available now, without any discounts for current RC8 Steam users. At least RC8 continues to work fine for now, but won't get any further updates.
Save 20% on aerofly RC 8 on Steam
Aerofly RC 8 is THE model flight simulator with extremely real flight physics, fantastic graphics and VR mode. Targeted model flight training and incredible…
store.steampowered.com
Realflight did something similar with RF9.5s in favour of their newer RF Evolution RC sim. At least this was a free upgrade if you bought RF9.5s on Steam, or about a 30% discount if you had upgraded from RF9.5 Horizon Hobbies version.