I like spoon theory, but I do not really "get" the metaphor. I prefer bandwidth. Like, everything takes a bit of bandwidth, from ambient noise, to social interaction, and daily routines. If my bandwidth gets too low, I shut down. If I keep pushing, meltdown. #ActuallyAutistic

I like bandwidth, too. It implies that there is a capacity limit.

I think I remember that the creator of it just happened to be trying to explain while at a table, so spoons were the physical object at hand. I'm fond of spell slots.

I think for some people it's just easier to understand/explain using tangible objects that you can hold in your hand. Especially since a lot of folks see energy/bandwidth as a resource that is limitless if you're determined enough. Spoons are finite & very clearly can't be generated from nothing.