Just to chime in with a real-world scenario of networking being a pain.
As a person who relies on a 4G network for the bulk of my connectivity - the NAT type of a mobile network is often restrictive in general and it's not a Construct issue. For example, if you want to play multiplayer games on the Nintendo Switch you cannot use a 4G mobile network because the NAT type is incompatible.
Plenty of other AAA games also have warnings about functionality not being quite right if you're using a Strict NAT type as is the case on mobile data - Destiny 2 is a prime example of this.
A lot of people have complained to the major providers here in the UK at least (particularly those like me who would want to use 4G for their entire home network) but so far they're not interested in changing.