> I just cannot discard the flexibility of being able to jump on most machines and be 99% productive almost instantly.

You can easily discard it if you can become 200% productive with better defaults on your machine. Like, do you also not use any plugins just because they aren't available on another machine?

Also the keyboard comparison doesn't work since it's not as hard to copy your editor to another machine

> do you also not use any plugins just because they aren't available on another machine?

The vast majority of plugins don't fundamentally change how you interact with text.