Prince Harry is currently fifth in line to the British throne, but he will be pushed down to 40th in line when his younger brother, Prince William, has a third child. This is because the Succession to the Crown Act of 2013 changed the rules of succession so that the children of the first six in line to the throne are no longer automatically in line to the throne.

Meghan Markle is not in line to the throne, so she will not be affected by the change in the rules of succession. However, it is possible that she will be upset by the fact that Prince Harry will be pushed down in the line of succession.

The change in the rules of succession was made in order to ensure that the line of succession is more gender-neutral. Under the old rules, only male heirs could inherit the throne. However, the new rules allow for the daughters of the first six in line to the throne to inherit the throne.

The change in the rules of succession has been met with mixed reactions. Some people have welcomed the change, while others have criticized it. It is likely that the change will continue to be debated for some time.
The change makes the line of succession more gender-neutral.

It allows for more flexibility in the line of succession.

It could help ensure that the throne is passed down to the most qualified person, regardless of gender.

Cons:

The change could lead to instability in the line of succession.

It could lead to challenges in determining who is next in line to the throne.

It could be seen as a slight to the royal family.

Overall, the change in the rules of succession is a complex issue with both pros and cons. It is likely that the change will continue to be debated for some time.