I hope SDAs still study the Bible on their own, however, I fear that only a few do it that way.
Are SDAs still a people of the Book?
We can't generalize -- there are definitely Adventists who are still a people of the Bible.
But sadly there are also many Adventists who really are not anchored in scripture.
The prominent ecumenical idea that doctrines don't really matter is doing its work even in Adventist churches. Also the many and varied "long discussions presenting new theories in regard to the prophecies which God has already made plain" have also had a very negative effect.
A lot of people just say "what difference does it make", nobody agrees on what the Bible says anyway, so who am I to figure it out, just believe Christ died to save us, live a decent life and that's all that matters.
Spoon feeding is very readily available and some would rather be fed their spiritual food rather then to dig for themselves.
Then there are others who a merely cultural Adventists -- they are comfortable in an Adventist life style, but it's more like a club than a commitment to any doctrines concerning salvation.
So, yes, there is no generalized statement that fits all members of the Adventist Church.
Hopefully each of us are part of the group that wants to be firmly anchored in God's Word. The deceptions will be many and strongly convincing and only a "thus saith the Lord" will help us discern them.