ARM is much less developed than x86 from the viewpoint of a Linux developer. In the case of x86, for instance, you can usually download Python wheels that are already built, you can find wheels that are built for various SIMD levels, with highly optimized numerics, etc. Building software on ARM that isn't phonish is more of an adventure.
If your goal is "personal workstation that smokes current workstations" based on an ARM processor with a monstrous core count and memory bandwidth you are going to have to confront the problem of making a 64-core machine feel snappy, which means you need to take advantage of parallelism to a high extend, understand the very different memory consistency model, etc.
If your goal is "personal workstation that smokes current workstations" based on an ARM processor with a monstrous core count and memory bandwidth you are going to have to confront the problem of making a 64-core machine feel snappy, which means you need to take advantage of parallelism to a high extend, understand the very different memory consistency model, etc.