I don’t really want to focus on that part of my post; there are a few active threads (such as Ongoing issue with Awaiting Settlement - #18 by PaulGichemi), and it’s generally niche ETFs and/or small purchases/sales that struggle to settle in reasonable times. Even if it is limited to just these smaller ETFs, it can cause issues for the entire portfolio until it settles. It’s an issue that just hasn’t been resolved.
The bigger point is, if I can make immediate purchases without waiting for cash to settle in the same portfolio, what is the difference in immediately transferring that unsettled cash to a different portfolio and making a purchase? Or transferring an ETF holding to a different portfolio and then selling that ETF and making an immediate purchase?