terra::zonal is for taking the average/max/min/etc of an area. So if you have polygons of state borders, you could take the average for each one. Not familiar with the others though!

I'd say just make sure you've read and understood the warning section in the readRDS documentation.

Also very handy for shiny development!

Wow, this is great! Today I learnt about str_view() and its change me relationship with regex in R forever...