I think I’m just getting old. I have a collection of KaiOS phones with Cortex-A7s but now they’re over a decade old :(

Newer ones have the Qualcomm 215, which, yes, is 64-bit 4x A53

From that perspective, LWC is only useful on old (existing?) microcontrollers: the Cortex-A320 that came out this year is 64-bit.

Hardware cycles take time, though, and it will be some time before everything is 64-bit!