So, you got what you wanted for years, but, a few years ago, they expanded to start giving other people what they wanted, and you're annoyed? Yeah, we've been over this, that's true. But the fact that you keep insisting that stuff happened that actually hasn'T happened, is why we keep coming back to this.
1. Nothing in Spelljammer contradicts 2e Spelljammer in any meaningful way. Yeah, there's a couple of minor differences, but, lore wise? Nope, it's the same.
2. Dragonlance specifically doesn't contradict earlier lore. That's the whole point of the module.
3. Yup, it's a new take on Ravenloft. Ya got me there. One book out of the half dozen or so lore books for 5e actually does change stuff. Granted, it mostly changes stuff from 3e, none of which was canon and none of which was published by WotC, but, yup, it does change stuff.
What else? FR is largely unchanged. Greyhawk is certainly unchanged. They haven'T really dipped into any of the other settings, so none of them are changing. What is this "overtly messing with setting lore" that you keep talking about?