Saving compute in consumer facing devices saves machines and power, too.
I’m in no way defending electron. It’s just not taking back the power and machines saved by ffmpeg. Which is a happy accident that’s nice. Restart your electron hate all you want.
I don't know about you, but everyone else sure does. Minimum requirements (even though not told explicitly anymore) has been constantly increasing.
Apple stopping support for security upgrades is the issue requiring a phone to stop being used, by you or the 2nd hand recipient. Same issue for the various android vendors.
That sure won't change if your phone uses a little less battery decoding movies and your battery use will still be dominated by screen use.