Do you want to be able to scale up and down easily?
There are multiple situations that require a varying performance. Of course, there are seasonal companies, but also companies that have large promotions. Within e-commerce, we are all familiar with Black Friday and the Christmas period. During this period, more is demanded of the hardware due to the many online purchases and website visits that take place. Then a higher performance is desired than in the rest of the year.
Are you a company that expects a lot of growth? Then you probably also need extra employees. Who will run the computers and laptops on the same server. Which demands more of the performance. If you do not want a loss in performance, then it is useful to have servers that allow you to easily scale up.