[tyu2]

> usually has a No. 1 player which takes more than 50% of the market share

> It is a very crowded field and very difficult to catch up to current leaders.

With more than 50% market share it's the least crowded field there is, basically a monopoly formed by a very high barrier of entry, because not everyone has billions to risk on complex long term projects, private investors prefer shorter term returns. But it doesn't mean it's difficult to catch up or that the leader produces something good, on the contrary, monopoly means low quality, slow innovation, high price, easy to catch up by just throwing money at it, it just takes government involvement to do it.