allowed? Like who controls that? It is just a self-imposed rule.
This guy thinks that SSF means that one has not traded with other players
How I do it then? Most of my chars are pure mega purist SSF, no crucbile, no shared blueprints NOTHING. But now and then I speedlevel chars, just getting to lvl 94 asap with high reputation. It is fun to mix things up, sometimes you just wanna do a fun endgame build. What I would really like to have as option in game is a “SSF” button for a certain char, instead of having to move files here and there…
New players probably just want to play the game as it is, crucible is also something that must be purchased. Exp gear = exp potion, rest is just icing on the cake.