Climbing, V-Everesting Route
Zwift has AdZ and Ventoux. MyWhoosh has an Everesting route, although not ideal due to extra distance covered for turn arounds.
It would be nice to have a dedicated climbing route that is say 1106-1110 meters and thus requires about 8 repeats to complete an VEveresting. Ideally something with (short) turn arounds at the top and bottom and few if any intersections where someone might accidently turn off.
Lastly - limit gradient to 8-12%. That way you can complete the everesting without having to constantly be changing gears. Lower gradient at switchbacks is fine to provide rests. And no negative grades on the climb direction.
Climbers Delight and Straight Up are close, but not ideal for repeats.
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James Eastwood commented
I vEverested the main mountain in TPV. It works well, although is a lot harder than AdZ (due to realistic speeds) and there are a couple of sections on the descent that require a short amount of pedalling. If you ensure the direction arrows are correct on the first run, they will stay the same for subsequent attempts.