As ARM is regressing in the Cloud market, as you can see with Graviton, we want to invest in the future. I don't think it will be particularly bad for 7 Pi 4s to match with a E5-2670 v2 in anyway. You can also listen to [this guy](https://youtu.be/HUamq0ey8_M?t=797) for a briefing.
From my perspective its 4*7 = 28 weak ARM cores vs 8 strong x86 cores. You can see that ARM actually had more cores, giving it an advantage plus to parallelized workload compared to x86.
Hell, maybe we can mix them in a bunch so that x86 runs powerful applications like GitLab, Prometheus and Postgres while ARM runs massively parallel workload that GPUs can't handle: Function as a Service (in AWS terms, Lambda; in CNCF's term, OpenFaaS), Linkerd handler (service mesh needs some kind of scheduling though), microservice replicas.
In the end CPU are all going to have a designated purposes, despite it should have had been "general purpose".
From my perspective its 4*7 = 28 weak ARM cores vs 8 strong x86 cores. You can see that ARM actually had more cores, giving it an advantage plus to parallelized workload compared to x86.
Hell, maybe we can mix them in a bunch so that x86 runs powerful applications like GitLab, Prometheus and Postgres while ARM runs massively parallel workload that GPUs can't handle: Function as a Service (in AWS terms, Lambda; in CNCF's term, OpenFaaS), Linkerd handler (service mesh needs some kind of scheduling though), microservice replicas.
In the end CPU are all going to have a designated purposes, despite it should have had been "general purpose".