But it's interesting to speculate on what English does which could be considered pointless: * Gendered pronouns (he/she/it) - some languages e.g. Persian/Farsi do with a single pronoun for both. * Number agreement for 3rd person verbs - i.e. he goes but they go. * The continuous aspect. In many languages the expressions 'I run' and 'I am running' are identical. * Articles. 'A cat sat on the mat.' Many languages do without these words and rely on context. * Required tense marking. 'I speak', 'I will speak', 'I have spoken'. Some languages make the distinction optional - i.e. 'I speak' can mean 'Today I speak', 'Tomorrow I speak', 'Yesterday I speak'.
Or things which could be useful to introduce to English: * Animate/Inanimate pronouns - i.e. a formal distinction between 'it' (used for objects) and singular-'they' (used for humans and similar). * An actual second-person plural - like y'all, yous, etc. rather than 'You' functioning as both singular and plural. * A distinction between we (including the person to whom you are speaking) and we (excluding that person). 'We are going to the zoo tomorrow' - does that mean me and you, or me and my family? * A grammatically distinct future form - 'I walk' -> 'I have walked' in the past tense, changing walk to walked, but 'I will walk' in the future using the same form as the present.
Also, if you don't know Spanish, I'm not going to teach it to you.
It's true it goes back to 1300, but it had also fallen out off fashion and was considered "wrong" later on. Languages change, and don't do so in a linear straight-forward way. From our perspective, it's very much a neologism (although it's been a few decades, and arguably already passed the neologism stage).
This is unlike, say, German, where each word has a random gender and you need to learn it along with the word. There, I agree, that's unnecessary overhead.