25GB switches do 1/10/25GB, can be used with copper and fiber, use a magnitude less in power per port than a 10GB copper switch and cost the same or less per port than existing 10GB copper switchs.
If you need 1G or 10GB over copper you can just use a SFP or SFP+ media converter in a 25GB SFP28 switch port. If you have a POE requirement, say for video cameras you either use a dedicated 1GB POE switch or power injector. A 10GBASE-T (RJ-45 copper) switch consumes 3-12 watts per port and a 24 port switch will idle at 50 to 60 watts and run hot. SFP+ and SFP28 ports use under 1 watt per port. I would never recommend a 10GBASE-T copper switch for any use case in this day and age, home or enterprise.
Yep, 10gb over copper is not power efficient so any savings you get from getting a cheap 10gb switch will just go to your power bill. Most cost effective and flexible is a used 25gb switch. Most 25gb switches can do 1/10/25gb. 10gb networking has been dead for over 10 years.
No doubt. Reading this thread leads me to believe that almost no one wants to take responsibility for anything anymore, even hiring the right people. Why even hire someone who isn't going to take responsibility for their work and be part of a team? If an org is worried about the "bus factor" they are probably not hiring the right people and/or the org management has poor team building skills.
Some of the largest orgs have large amounts of IT infrastructure for OT and ISS that is not connected to the Internet. This infra is air gapped or often times on a completely separate physical LAN which is not accessible without passing through multiple physical security controls.
There are a lot of OT, safety and security infrastructure that must be run on premise in large orgs and require four to five nines of availability. Much of the underlying network, storage, and compute infra for these OT and SS solutions run proprietary OSs based on a BSD OS. BSD OSs are chosen specifically for their performance, security and stability. These solutions will often run for years without a reboot. If a patch is required to resolve a defect or vulnerability it generally does not require a reboot of the kernel and even so these solutions usually have HA/clustering capabilities to allow for NDU (non disruptive upgrades) and zero downtime of the IT infra solution.
The BSD/Illumos OSs are used quite frequently as the base OS for high end commercial/enterprise network, SAN, NAS etc. solutions. They are chosen for it's performance, stability and HA features.