I recall @Patrick saying in this review of a Silver 4108: "... the Xeon Silver 4108 is absolutely sipping power. This chip borders on Intel Xeon D territory and below Intel Xeon E3-1200 V6 even with more memory installed."Low power is really where they tend to excel.
Not terrible CPU’s if you don’t need a whole lot of cores.
The 8,10,12 core ones are pretty popular.