Resumed road cycling today. 30 miles. Observation: it's easier climbing big hills without the blood clots in your lungs. Felt great.
Obigatory Di2 Rapture: If you don't yet covet this gear, it is due to your ignorance. That's why I never coveted it. I'll never buy another main road bike without this stuff. It's the best thing since canned beer.
If you don't know about this, carry on. Ignorance is bliss. And it's cheaper.