Lithium is a common abundant resource and battery packs are easily recycled but more importantly there is a financial incentive to do so.
Manufacturing technology for cells is improving rapidly. Much faster than the pace of innovation in Hydrogen fuel cells. Most are focusing on reducing Cobalt and other techniques to reduce or eliminate chemicals and energy used in wet electrode processes.
Hydrogen is pretty much DOA for cars. This is a good video on the subject: https://youtu.be/f7MzFfuNOtY