I was using a laptop with windows 10 and 4GB of ram and an anemic CPU a few times a month two years ago. Even with a fast network, a laptop with no ram is gonna be slow to browse, and bloated pages are gonna be slower.

It will certainly help to download the bloat faster, but you've still got to do all the hydration as OP put it.

Based on my experiences with windows 11, that laptop seems like it will be quite a bit worse than the one I was using, even though mine probably has a much worse cpu.