Earlier quoted context omitted.
I am missing how AWS/GCP/Azure does not solve this for you. Price point?
On prem. Reliable and inexpensive network connectivity they has any resemblance to a 10G LAN doesn't exist where I am. I work with some businesses who need very, very reliable, high-bandwidth, and low latency connectivity to their data. The amortized cost of on-prem beats the cost of any off-prem offering as soon as the cost of the necessary connectivity is factoted-in.
Your not going to find any serious hardware product with reliability guarantees, in writing, for much less than half a million anyways.