Interesting question…
I (unconsciously) kept the # of more risky, most likely temporary investments (i.e. SPACs) below 5 to keep track on them.
Beside that I don’t see a reason to limit the amount of safe bets (long-term) as I don’t really actively check on those companies / sectors post the investment decision.
This being said, it would really help to have some sort of grouping / filtering option in T212 (feel free to push Portfolio list ordering - #3 by BullChew).