I have no problem with quantum foam, existing data, etc. I have a problem with redefining nothing to mean something. Now you have two words for 'something', and no word for 'nothing', and that makes no sense. Nothing and something are two specific concepts, and if the concept of nothing doesn't apply, use something else. If something looks like nothing, but it isn't, just stop calling it nothing instead of performing mental gymnastics to make nothing mean something.
If it was as simple as nothing being nothing in a context, such as 'There is nothing in that box over there.', then sure, there's no problem, even if I don't like it. It would just be casual speech, but I don't think that's what's happening here.
The notion that there has to be a scientific definition of nothing that's different from the philosophical absolute nothingness is flawed. In science, if it's not nothing don't call it nothing. It's literally that straightforward.
That's Thorham, thanks 👍