Being exactly such a person myself, I can tell you that people with niche interests run into performance bottlenecks you just don’t see normally. A key example of such a use-case comes in the form of using graphics cards externally over Thunderbolt. We normally think of the bandwidth between a GPU and its host as a non-factor in performance,

Source: Hot Hardware – GeForce RTX 4090 Used As An External GPU Takes A Big Performance Hit In Benchmarks