I mean, "computing power" in a literal sense maybe, but does that matter if it doesn't translate to either "workload contention" or "electrical power"?

I think the Liquid Glass effects, similar to smooth scrolling, are mostly just running as pixel shaders on a spare tile of one of the SoC's GPU's Streaming Processors — a tile that likely likely would have been idle-but-burning-power-anyway, given that GPU power management occurs on the level of entire SPs. It's the same reason that ProMotion "smooth viewport scrolling" doesn't really cost anything.

Sounds like you need to spend some money for a new Apple device! /s

I’m optimistic that they will eventually course correct on Liquid Glass, but we’ll have to wait until iOS/macOS 27, or perhaps longer.

There are parallels to Apple’s butterfly keyboard fiasco on the hardware side. Sleek looking on the surface but an objective step backwards in usability. Unfortunately it took Apple several years to reverse course on that one.