You stated about that Sn2 reactions are not the only ones affected by steric hindrance-so what other types of reactions are affected and will we need to know them now or later? (Regioselectivity of hydroboration, ant-character of E2 - GS).

Are you going to over examples of these? (We did. Markovnikov rule, Zaitsev rule, staggered and eclipsed conformations - GS).

Before you get too carried away, what is regioselectivity? (Preference to react with one part of the molecule as opposed to another, such as addition or elimination. - GS).