I get a lot of friend requests and see a lot of profiles of people who are currently learning 3, 4, 5 different languages all at the same time. I understand that in some places (especially in Europe) this is necessary due to the close proximity of different countries. However, these people are learning English, Arabic, Japenese, Russian, Blackfoot, Ancient Sumerian, Morse Code, etc... all at the same time which I can't find any reason why. I'm having a really hard time just trying to learn Chinese so I am baffled as to how these people can manage so many languages at once, especially when they claim to be at a b2+ level in all of them.
I think some people just get carried away, with the possibilities here.
They might think that adding a lot of languages will turn them in learners of that language automatically (same logic with people who highlights a lot of text when studying).
There are some people also, like myself, who achieved a comfortable level in a language, and then proceed to another, but this doesn't mean that we mastered the language and stopped studying it. We are just putting more effort/focus in a new target.