I've had a number of recliners over the years, but have never seen one with an infinite number of reclining positions. Whether a lever on the side, or simply 'push back' there's usually just 3 or 4 different degrees of recline. That's not to say there may not be an electric one out there that does offer more, but would most likely be at a price point that would equal a bed that does much the same...

I have slept in a recliner and....no matter how soft, wide and comfortable when you fall asleep....being locked into just one position becomes uncomfortable, especially if you're experiencing pain in your hips. I still long for my water bed....the most comfortable bed of any I ever had and didn't put any pressure on those joints that hurt...