Some examples of perks to be had because of giving in to the ecosystem..
1. Copy something on phone, and paste it on any application on Mac (and vice versa)
2. Instantly access all photos taken on iPhone for quick edits on Mac, or even to upload somewhere on a website(passport, dr.license and such).
3. Notes.app that is the same on iPhone and Mac because of iCloud. Notes has become my knowledge base.
4. I also have an iPad. Need to sign a PDF document? Right click and send to iPad where I can use my Apple Pencil. Save the document and it is instantly on my iCloud Desktop.
I can’t imagine the independent way of doing things again :-(