i have realised that, if indian restaurants and takeaways started selling samosas and bhajis in 1s rather than 2s (so for example you asked for a bhaji, you get 1 bhaji, you ask for 2 bhaji, you get 2 bhaji) then the word 'portion' would be completely obsolete and could be removed from the english language entirely.

portion of rice - nobody says it
portion of chips - nobody says it

this weird thing where bhajis and samosas come in 2s just causes confusion and means that word is still needed.