At least with desktop you sometimes get a CPU upgrade path. For example, with Socket 939, I started with an Athlon 64 3000+, and upgraded later to an X2 4200+.

At least with desktop you sometimes get a CPU upgrade path. For example, with Socket 939, I started with an Athlon 64 3000+, and upgraded later to an X2 4200+. With Socket AM4, I skipped the first generation, got a Ryzen 2700X, then skipped the next generation, and then got a Ryzen 5900X! (But a solid 4 generations on the same socket!)