Your biggest problem is in No. 3 which creats a logical circle. Dominance,
by literal definition, implys no other or few other choices. In that
environment, it is extremely hard or even impossible to find a proven better
substitute because even if one potential substitute did well in its small
market share, it does not necessarily mean it could do well in a bigger
market.
The entry barrier is not always the same. Certain level of entry barrier
will help form dominance. When the dominance is