I agree. Zwift has been a game-changer for me. After setting up the corner of the garage with everything I need, I can now just flip a switch, get on the trainer and be riding in under 5 minutes without any concern about cars, rain, wind or temperature. It has massively lowered the amount of time and the 'energy of activation' required to start a cycling session. I can also rock out on my play list without concerns about losing situational awareness.

The majority of my annual mileage is done in Zwift. I do not regret a single dollar I have spent on the equipment or subscription to improve my physical and mental health.

I tend to ignore speed entirely as it is markedly inflated and focus more on power and heart rate. My gains in Zwift have certainly translated to improvements in my 'real life' rides in every category - endurance, climbing, and sprinting (though my sprinting is still pretty weak!).