I feel like any linguist upset by non-prescriptive language needs to maybe reconsider their life choices. Imagine telling someone they’re painting incorrectly or being mad at the discovery of a new species.

Octopi, octopuses, and octopods are all valid pluralizations of octopus in American English.

Conversely, cacti is the only valid pluralization of cactus.

Don’t worry, language itself pissed us off long before you did.