Argentinian here; yeah it's bullshit, also there's no single "Argentina spanish" or "Spain spanish", Andalusian is very different from Madrilean etc.
I have to say though that Chilean spanish is commonly considered quite hard to understand, they speak really fast with lots of mannerisms and "can't understand a single thing of a Chilean speaking" is a common meme in Argentina at the very least.
And even that data is kind of suspect, based on a simple glimpse at the screenshot, which shows idioms for "ISN'T IT?". Colombians definitely would say all of the following, unlike shown in the table:
A cada quien le va según quiere Dios, ____
- cierto?
- no?
- o no?
- si o no?
And actually would probably not say "si?" as shown. "Verdad?" might be heard, but maybe an older generation.
From my experience, (Portuguese native speaker who learned Spanish) Colombian Spanish is much easier than Mexican. And the worst Spanish, by far, is from the Dominican Republic. Chile is not that bad, it is quite close to Argentinian, actually.
If you are on Windows, the antivirus might have something to do. It used to be slow for me too but I added an exception and now it's really fast, or at least fast enough so I don't perceive any significant lag.
I like Dan Abramov's "The Wet Codebase" (https://www.youtube.com/watch?v=17KCHwOwgms) -- I've been guilty of doing just what he says in his talk at first, removing all duplications and making the codebase DRY. But then I came to like "prefer duplication over the wrong abstraction", as Sandi Metz puts it.
Sometimes it's good to wait to have more data to make an easier and more informed decision.
You can't learn a programming language like that, unless it already has very similar paradigms to languages you already know. For example, try to learn APL[1] or Haskell like that (or just assembly if you haven't done any kind of assembly yet).
[1] And that's not just because of the arcane symbols.
That was my first though, but a) it seems that the `using` syntax is not exactly the same as in C# (unless the old C# I used to use) and b) still I wouldn't mind, C# is a great language
It also makes it very hard for new devs willing to learn Python. Coming from Ruby and JavaScript, you just use bundler or npm, but Python is so strange, even the way it runs files is different, with the module thing.