Generally I believe most people like to order their workspacesroughly by topic, e.g. all work related Windows on one, browser or on another, some also do all terminals on one... Now with sway/i3 I often found myself in the situation where I was e.g. on the "browser" desktop and you read something you quickly want to try in, e.g. ipython, or you are working on a latex document and want to briefly open a PDF. In i3 that would reduce the size of your original window, so you end up switching to a workspace (or you manually switch to tabbed tiling) for me the mental overhead was significantly higher and I was ending up creating more and more workspaces just to hold temporary terminals.

This is actually related to why I switched to i3 in the first place, I just felt vertical tiling is the only tiling that makes sense in 95% of the cases and that just worked best in i3. But that comes at the cost that you are limited to only 3-4 tiles per workspace (depending on screensize) now in niri I have infinite theoretically. Which means I spend less mental overhead when I want to open another window (which is really thebgoal of tiling wms in my opinion, reduce thinking spend on window management)