@Hussar's argument, as I understand it, is that Halflings take up valuable page count in the PHB that could be better spent. It's no rebuttal to this argument to show that most people don't object to Halflings, or can just ignore them. That's true of lots of stuff, but isn't a reason to include that possible stuff in the PHB!
But it's also not a reason to
not include them in the PH. Removing them doesn't make the game better; it just removes an option.
Let's talk about a hypothetical 6e. Part of the argument that Hussar and others have used is page count, since nobody wants to carry about a textbook-sized PH. But since we don't know how they're going to do races--or lineages/cultures--in 6e, we can't say that the two or three pages gained by removing halflings is going to be a major savings.
They might go strictly for a Tasha's style thing, where you pick a package of racial abilities, then a package of cultural abilities and can mix-and-match them to your heart's content. In this case, "halfling" would be just a couple of paragraphs to a page.
They might include relatively little lore for the same reasons that they included relatively little lore in VGR (which, presumably, was to allow DMs to make up their own lore and/or because you can already find all that info online, so there's no point in repeating it). In this case, halflings would have just as much lore as the other races in the PH, and outside of setting books, it would be entirely up to the DM.
They might include a bunch of other well-liked "nonstandard" races in the 6e PH, like full orcs, aasimar, genasi, gith, or tabaxi (anyone else think it odd that there have been no major
canine races in D&D? Yeah, a few have been made, mostly for Mystara, but they haven't really taken off). In this case, having something as normal as a halfling provides a nice counterbalance of normalcy to the alienness of the other races.
They may include a brand new base setting for 6e, like how 4e did Nentir Vale, and include a lot of lore on halflings in there. Especially if they do a playtest and people complain about the lack of halfling info.
They may actually decide to produce more digital content, believing that people will buy the dead tree PH, put it on a shelf, and mostly rely on the digital version when not at home. In this case, they could include as much info on halflings as they want since electrons don't weigh anything.