Google guarantees ChromeOS Flex support for each supported model for a certain amount of time, see https://support.google.com/chromeosflex/answer/11513094

It's been so long I had almost forgotten about this... there was also at some point a 3rd party camera app which had a secret setting (activated by entering some URL into iOS Safari), enabling the use of the volume buttons to trigger the shutter. When Apple found out, they banned the app from the App Store. Not much later, the iPhone's built-in camera app got that feature which we all take for granted now.

Google Docs is in fact a text editor with Markdown support, see https://support.google.com/docs/answer/12014036

Been there, done that. After a bit of back and forth, Telekom basically recommended that I go and use one of the big SMTP servers and stop bothering them. While I hated myself for doing it, I eventually switched to Gmail for peace of mind.