What I find fascinating about this kind of attitude is that the very first mobile phone I ever saw, late 80s was powered by two lead acid batteries and was the size of a pull-along suitcase. Wholly impractical, but paved the way for a brief foray into alkaline and then once phones became truly pocket sized, Lithium. As with everything, new tech is going to be expensive due to set-up costs plus a relatively small market. But as with all tech that will change. As the switchover continues prices will fall. And eventually lead acid will be relegated to older machines for a time, until the tech can deal with them too. Ive been very lucky, the lithium battery in my own bike has been completely reliable and in the almost 3 years of ownership I have seen 3rd party replacements appear 1/4 the price of the OEM... which has forced the price of the OEM down to a degree. A 1000cc bike with a battery little bigger than a packet of 20 cigarettes - 4" wide, that when standing unused will lose 1% of its charge per month. so not much need for a charger/maintainer. Quite amazing.
Lithium battery tech for motorbikes and other vehicles is based entirely on the tech used in mobile phones, and we dont give that a seconds thought. I never see phone owners wishing we could go back to the good old days of lead acid.. or even Duracell type alkalines in their phones... its all about longer usage times and shorter charge times. More from less and as cheap as possible. Safe obviously as its often kept in a pocket.