What are you talking about? I've not been back that long and I've seen a bunch. Horus Heresy 3 they're struggling to shift. GW bringing back The Old World was another.
Struggling to shift product is not the same ad admitting they fucked up so badly that they had to replace it with the previous version. That's a whole other level of fuckup beyond product collecting dust. That's what happened with the 2021 combat patrol ork boyz sprue that only had 5 choppa and 3 shoota in it, so you couldn't even make an otherwise legal squad of all choppa or all shoota boyz.
Yes, Old World and HH 3.0 boxes are sitting around collecting dust. So were Adeptus Titanicus and Aeronautica Imperialis, even Legions Imperialis doesn't get stocked at some GW stores now other than having a mandatory copy of the starter box. But none of that is the same as this walkback of a fuckup.
Sure, they still sell that sprue from the combat patrol
But they also sell the previous one because they fucked up
It's not one of those always out of stock listings, it's not made to order, it's not a web exclusive only sold in the generic white box, it's a black eye that a boycott worked and they had to do something about it rather than just slowly drop support for something and let it fade out of existence. And no, I'm not mixing this up with beast snagga boyz, that's a separate kit and listing
And in case you haven't noticed, they're still releasing stuff for The Old World, and HH 3.0 so clearly those didn't entirely flop(they're also releasing shit for LI but again, that's not the same as having to dig out the previous version of the mold because the updated one was rejected to quickly).
For similar 40k shit where this didn't happen:
Inquisitor Coteaz(character, and a rarely used one at that so the low volume is kinda whatever)
Blood Angels Sanguinary Guard. Imagine if they still had the previous sculpts online for these guys?
Yet somehow it was Ork Boyz that got so much flak and so little sales, they had to drag out the previous version to make people happy. That's a successful boycott that wasn't even discussed to be a boycott, just that the sprues were shit and people didn't want them.