Depends on how you define “constant”. Battery prices have been falling year over year, no thanks to technological improvements.
If we’re referring explicitly to Academia and R&D, then OP is correct. You’re main point is that these huge breakthroughs haven’t affected the market, but OP isn’t arguing that.
You’re both talking past each other.
There have been steady and iterative advancements.
Steady imo is a synonym for constant, and revolutionary breakthroughs can be subjective if referring to industry or academia.
When was OP involved in this conversation?
Apologies. I sometimes refer to an OP as the Original Poster of a thread in a given post, but perhaps a better use of language would be OC for Original Commentator.