Yes, they do materialise, just not in your/GGP's attention span it seems, nor all at once, nor at your convenience. Read an electronics catalogue rather than
I have the benefit of a nice big LiPO4 pack at home, enough to run my server for a couple of days, which would absolutely not even have been a twinkle in my eye when I started in electronics and computing for example. Oh and a couple of months' worth of lead-acid behind it, essentially a century-old technology with a little bit of gel and MPPT cleverness folded in much more recently.
Retail tech is full of tiny incremental improvements, which sometimes started as R&D tech breakthroughs many many years before.