Why has the hype around solid-state batteries faded away so quickly?

KeyWord:MG4,semi-solid-state battery
 The 2026 MG4 equipped with Version 2.1 semi-solid-state batteries went into mass production and launch on December 18 last year.

 
Starting this year, the company will gradually roll out mass-produced vehicles with semi-solid-state batteries across its brands, with details subject to official announcements from each brand.

Recently, while browsing industry information online, the author noticed SAIC’s official reply to investor questions on the Shanghai Stock Exchange E-Interaction platform regarding when solid-state batteries would be mass-produced and installed in vehicles.

 
I also recall that around late last year and before the Spring Festival, NIO released news stating that its 150kWh semi-solid-state battery packs had begun batch delivery.
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