How simple your architecture has been made after you start using the AWS Transit Gateway.

Providing that earlier there was a difficulty for different AWS VPC to talk to each other, need to make VPC peering, which some time is like full mesh, which can be difficult to manage. Else need to carry AWS data toward the On-prem DC and then back to AWS for different VPC. So I need the insights how you guys are making the networking more simpler compared to your old AWS cloud infrastructure.