Err....I think you should check out
@leman's past posts. He seems to know a hell of lot more than you appear to....
You don't sound like someone who is actually an IT professional, but a hobbyist. Nothing wrong with that, and it was my interest in computing as a hobby that led me to study computer science at university and have a 30 year career building enterprise software and hardware solutions. Feel free to correct me if I'm wrong, and post your credentials for us to inspect.
I encourage your interest in computer hardware, but you do need to realise that the choice of hardware and platform is only a small part of the overall considerations and cost of system implementation. The cost of software and people to write it, use it & maintain it is a far greater concern in most cases.
The choice of computing platform depends on the task and users. End users, developers and system compute/network/storage platforms are all likely to be different. e.g. an inventory control app running on phones & tablets, with software developed on Linux workstations with specialist PCIe cards, data entry and management done on iMacs, and running the back-end on hybrid public/private cloud infrastructure combining AWS/GCP/Azure services joined to customer data-center legacy systems.
In other words, you choose the tools appropriate for the job!