Other classes after that will feel like unplayable slog for them. SB not only is ridiculously overpowered but also at least has some more integrity than other classes where things just don’t play too well. They are just worse design.
People will get bored very fast, because SB is too easy and others are too weak and/or boring. I would be already if I didn’t play necro that actually has some difficulties to pass, even if it’s very strong.