I was hoping I might be encouraged to use rollers and save some money
I encourage you to use rollers and save some money. The gamification of training is not for your benefit, it's for the financial benefit of the people running the games.
Thank you for the voice of reason. Are there any serious risks riding rollers?
Falling off
Mostly less dangerous than going for a ride outdoors.
https://www.youtube.com/watch?v=HN1cuVRRRzM
Are there any serious risks riding rollers?
Not to your person. As with any stationary cycle training device, there is a severe corrosion risk to the bicycle.
@Airhead started
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I encourage you to use rollers and save some money. The gamification of training is not for your benefit, it's for the financial benefit of the people running the games.