But I do think msufan introduces an interesting point about 2000s and beyond albums getting a bit lost in the shuffle, and I can speculate on a couple of reasons for this.
1) 2000s+ albums are simplynot as old, and therefore haven't withstood the test of time for as long. We have a great perspective on albums from the 60s, 70s, and 80s, and at least some perspective on albums from the 90s. Albums in the 2000s just haven't been around as along, and albums from the 2010s aren't even a decade old so it's pretty difficult to get a real feel for what's truly great, and what was just a bit of a pop fad.
2) The album format started dying off in the 2000s with the advent of internet-based distribution of music. We've actually returned a lot closer to the old single release model, which dominated the 40s and 50s. There's a reason 40s and 50s albums don't make these lists, and it's because the album format wasn't all that strong, rather it was the single release that ruled the day. Back then it was radio airplay that drove it, and these days it's more related to internet-based distribution, but either way, people don't listen to entire albums nearly as often now, as they did when the LP/cassette/CD was the premier format for release, in the 60s,70s,80s, and most of the 90s.