Given language always changes, does it really matter if you say "This is between you and I" instead of "This is between you and me"? Or "You stold the box" instead of "You stole the box"? What difference does it make so long as anyone can easily figure your meaning?
By - Bluecomments
Language is what you make it; the rigid rules inventions of tight-assed men obsessed with bringing order to chaos no matter the cost.
In casual conversation or online forums like reddit it's not that important. In professional situations it's a little more important because it looks too casual if you don't. There are pedants online who will tell you otherwise and misinterpret you on purpose for no real reason but you can ignore them.
Depends on the context of what you are writing and what you are writing for. Casual conversation with a friend or loved one? Probably not. Academic paper or essay for an official journal? Probably a good idea to follow that grammar rules.
There's a spectrum. Many people fail to understand when to use who vs. whom or mistake "between you and I" for "....you and me." Then there's "You stold the box." What's your goal? To have someone understand the most basic meaning of what you're saying? To be perceived as an educated person? To be taken seriously? Do you care if people think you're uneducated, dismiss things you say, don't hire you, don't want to date you, or fire you, because you can't be arsed to use correct grammar? If someone wrote this -- "You stold the box" -- to me, I would never hire them; I would think they lacked a basic education; I would not set them up with anyone I knew. If none of that stuff matters to you, ok?
At best, it makes you look like a foreigner/non-native speaker. At worst it makes you look unintelligent. And it's not necessarily a given that what you said is still easily understood.
Using badly wrong grammar or spelling makes you look uneducated or stupid. Honestly if someone said “stold the box” I would assume that’s some kind of baby talk and they’re mocking the situation. Small stuff is common and easier to overlook because it puts you in among the average error makers.
You’ll probably be understood either way. If you use poor grammar, one of the things that will be understood about you is that you can’t speak well. If your sentences are full of careless errors, it will be understood that you didn’t think your writing was very important.
I think there’s a difference between spoken language and written language. I’m not going to judge casual, colloquial language when it’s spoken. However, I am one who can be very pedantic when it is in the written form. It just seems to me that written language should be more formal.