Why are dynamic IP addresses needed if static ones are so convenient?

Dynamic IP addresses are needed for efficient management of a limited address pool and to simplify network administration. While static IPs are convenient for permanent servers and devices, dynamic IPs allow:

• Automatically assigning addresses to devices upon connection, without manual configuration.
• Saving IP addresses by reusing them for different devices at different times.
• Simplifying network scaling and the connection of new devices.

For example, in a home network, a router usually assigns dynamic IPs via DHCP so that manual configuration of each gadget is not necessary. This is convenient and reduces the likelihood of address conflicts.