The usual argument is that a well-written SPA will track its state correctly in the URL, including things like filters, current page etc.
The practical issue is that very few SPA apps actually do that consistently. Moreover, because it requires a conscious effort on behalf of developers, a fresh new app might be well-written in that regard, but over the years, as "got to fix this quickly for release" cruft piles up, it becomes worse and worse in that regard.
I think the only way to actually make this concept work reliably is to force people to store state in the URL somehow, or at least make that easier than storing it anywhere else.
The practical issue is that very few SPA apps actually do that consistently. Moreover, because it requires a conscious effort on behalf of developers, a fresh new app might be well-written in that regard, but over the years, as "got to fix this quickly for release" cruft piles up, it becomes worse and worse in that regard.
I think the only way to actually make this concept work reliably is to force people to store state in the URL somehow, or at least make that easier than storing it anywhere else.