Learn English – “this is a story of boy meets girl”

Your interpretation is correct--the sentence as currently worded seems to imply that the framework is still unfinished. (However, your corrected version has the advantage of being grammatically correct, which the original wasn't.)

I might try a completely different rewording: Development of the framework has been ongoing for about eight years. If you need to be explicit about the fact that you've already released, you could add something like In this time there have been N stable public releases, which can be downloaded from http://example.com.

"According to so-and-so" is a well-accepted phrase to indicate a certain level of authority. It doesn't mean authority in the sense of indisputable, world-class, absolute authority. It means authority only at the level of indicating that this is the person to whom the statement can be attributed.

It therefore has rather wide usage, all the way from according to my brother, Nancy went to the dance with Frank, right on up to according to Einstein, the universe is curved.

The lowest level of its reference to authority, however, is the second person, according to you, which sometimes is used sarcastically, thus: According to you, I should never have bought stock in Microsoft. Boy, were you wrong.

We don't take it down to the first person, because that becomes overly emphatic, or to put it another way, redundant. According to me is simply saying, this is what I say. It isn't considered necessary to say this is what I say when you say something. You just say it, don't you? I can tell you Nancy went to the dance with Frank without saying According to me, Nancy went to the dance with Frank, you see?

If we look at your examples, Mari-Lou, we can see a little bit more of why the usage sounds a bit strange to native English speakers. Since we do imbue a bit of authority to the according to locution, we usually feel according to my brother, our father will go to a nursing home someday does sound odd; we would instead tend to say my brother thinks our father will go someday, and the response would be but I don't think so rather than according to me he won't. According to in standard English usage is given some weight of authority, even at the lowest level. It isn't taken as purely opinion.