Plus, I think Windows strives to not be "batteries-included" in some ways, perhaps in order to encourage a healthy third-party software ecosystem (and perhaps to follow the spirit of the anti-trust ruling.) Windows 10 has fewer bundled apps than Windows 98 did. Nothing is an "optional feature" any more; it's all App Store packages [that happen to be made by Microsoft] now.
Windows 10 still has plenty of "optional features". Two ways of viewing these - Settings/Apps/Manage Optional Features (For instance, if you want to install openSSH, this is where you'd do it). Also, Control Panel/Programs and Features/Turn Windows Features On or Off. This is where you'd install the telnet client, container support, Hyper-V, tftp, etc.