But yeah. Any other preschool programming give that much care and effort for their older, nostalgic fans? I don't think so.
Well, there are the factors that Sesame Street is most likely (but it can be debatable) the most iconic, longest-running, still-on-the-air "preschool program". So there's a lot of good reasons for Sesame Workshop to put out stuff for its older fans than others.
Sesame Workshop did put out a couple boxed sets of The Electric Company, which wasn't on the air anymore but was big with nostalgic fans. Other "old school" Sesame Workshop shows (321 Contact, Square One TV) still don't have DVD sets, maybe they're not as iconic, or maybe they aren't old enough (well, maybe not when The Electric Company came to DVD).
When it comes to other shows, at least 100 episodes of Mister Roger's Neighborhood are available on DVD, albeit as part of a burn-on-demand program and just one episode per disc.
When it comes to other long-running preschool shows, there is a boxed set of Howdy Doody episodes. That show was on the air back when very few companies saw value in saving their shows, and I knew that there aren't many saved episodes of The Howdy Doody Show, so I was surprised to see a multi-disc boxed set of the show in stores. I knew that the last season was pre-recorded, not sure if those are the only surviving ones or not (I sort of thought most of those were reused/destroyed). Captain Kangaroo lasted a long time, but I;d like to assume that every episode still exists. Not sure whether it started out live or not, but the show did last into the mid-1980s, long after it became common for shows to be pre-recorded and saved (and I believe long after companies stopped recording over master tapes for shows not likely to be rerun), and episodes were rerun on PBS in the late 1980s. I wonder if there are any big DVD sets of that show.
While not as long-running, it's a shame that there aren't DVD sets (that I know of) for Lamb Chomp's Play-Along. And I don't know if anybody who grew up with Barney would be interested in nostalgic Barney and Friends boxed sets, but I wouldn't be surprised.
And it seems like Nickelodeon and Disney aren't interested in getting out their old preschool programming on DVD. I wonder if Shout's license to the Nickelodeon library includes early Nick Jr. shows. I once asked on Facebook and was told that the rights to not include Nick shows from the early 1980s like Pinwheel (and I read on TV Tropes that Nick wants that show to remain "a distant memory"). I feel like Disney would have more incentive to release older Disney Channel preschool shows like Dumbo's Circus and Welcome to Pooh Corner, since Winnie the Pooh is (or was until 2011) one of the companies biggest franchises and Dumbo was released on blu-ray a few years ago.
But think of all this, yeah, Sesame Workshop has treated its fans the best.