@OxoWWr4-6mxx These top supercomputers (you mean Top500 list?) are "scale-out". Well, simple HPC nodes. They works as separate processors. Purpose of interconnect is just to give them enough work, and then (few hours or months later) collect results.
But in your database server you need proper scale-up solution. Just look how strong is interconnect in Oracle Supercluster, all supported by silicon. Nothing in x86 world can match it.
@OxoWWr4-5vos SPARC has some good ideas even today. Software in silicon. Secured memory. Real time encryption. There is no x86 processor which offers that.
On the other hand, most recent x86 extension is AVX512, which is good for video trascoding (in Youtube datacenter) or science computations, but it has no utilization in your database server.
You know, because there is difference between database server, datacenter and HPC cluster.
And don't get misleaded by Intel's revenue in their datacenter group. It is 15B today which is significantly more than Oracle's 4B, but there are also some problems.
From HPC side they are beign replaced by Nvidia GPU's and FPGA's. Not on in AI, but also for general purpose computing.
And from other side, there is ARM threat in datacenters. Qualcomm already has 10nm server ARM and they are delivering it to some customers today, if these customers will adopt it as low cost alternative to x86, then it can shrunk entire Intel's datacenter group.
Because, if their revenue will fall below let's say 10B, they will lose interest in developing new architectures. And will happen something similar to others divisions which didn't met expectations. For example ITANIUM, mobile, iot... Lack of inovations, move to older manufacturing nodes (to save cost), rebranding old processors...
And everyone who relay on x86 will be ducked just as Itanium customers back then.