Google Docs and Photoshop Online have offline alternatives (and if you ask me, native MS Office is still the golden standard for interoperability of editable documents), and I use neither in my work or personal life.

Email is harder, but I do run my own email server. For mostly network related reasons, it is easier to run it as a cloud VM, but there's nothing about the email protocol itself that needs you to use a centralised service or host it in a particular network location.