I tried getting on the bandwagon when I was a teen, I read the first one and the ?th one (where we learn about Atlan) but there are way too many books to catch up with so I gave up.
I later discovered the germans where hundreds of books ahead of the french traduction so I googled it and found the whole cycle which is like 6 times the 150 books already translated. I am a bit sad my stepfather could die without reading the end.
I read the stories is a little bit shaped by real world social events (fall of the wall, cold war, hippies rise and fall, etc.) but I couldn't see it because reading a '73 book in 1999 makes it hard for a teen to see what is actually transposed in the book.
I can't comment on the S-F part though. From what I read it's really more like a low-key SF soap opera that is character driven (without much character development).
Nothing like `modern´ SF (Baxter, etc.). And not much science.
There is no end yet, the series is still ongoing.
One day I found out that the newsstand on our train station sold current copies of the series and I was amazed by the fact that they already sold more than 2000 issues (Current edition is at ~ 2800)! The silver books I read before were actually just a streamlined version of ten or so issues. So I starting reading the "first edition", and also bought reprints ... in the end I think I read maybe half the the whole series, but two or so years ago I finally hadn't the time keep up.