Last time they updated that was in 2018.l, so I think it missed out on some core book errata. It would seem to me that with Beyojd being available they switched their development of freely available basic rules to the platform...and since they now own Beyond, I expect thst is where the "play free of charge!" rules material will go in the future.
That update was pushed out at the same time a bunch of core book errata was published. I found
a video about it from back when Dragon+ was a thing. I just checked my copy of the 2018 Basic Rules PDF, and all the relevant Monster Manual errata and DMG errata were implemented.
But I was curious if the PHB-derived content was missing any changes, and looked into it. The
newest PHB errata was published in 2020 (there's
a copy on WotC's site dated 2021, but it's identical to the 2020 one). Mercifully, the latest one marks all the newest additions with [New]. Turns out the only errata left unaltered were changes to the text about racial alignments; basically removing any references to now-playable races like Orcs as being inclined toward evil. Whether those changes are a big deal or not to the end-user is gonna vary by player (as with all post-release updates), but the changes seem inconsequential to gameplay itself.
That said, I agree that it's not a great indicator that the Basic Rules will be revised in 2024 when already they've failed to include an update from 3 years ago. Then again, this errata hit during the peak of the "stay at home, play D&D online" days, where WotC was saying stuff like "here are the Essentials Kit and Starter Set rulebook PDFs for free (more colorful, but otherwise downgraded Basic Rules PDFs), and Lost Mine of Phandelver for free on D&D Beyond." But they were also putting the Basic Rules PDF download links front and center then, too, so....I dunno.
Who knows what their motivations (or orders) were that resulted in neglecting it in 2020, but I'm happy to wait and see if it makes a comeback this year or early next year.