Perhaps the anxiety is because there was a change, and not specifically this change?

I started using eM Client as a native desktop email app because of the new gMail reply feature. Feature-wise it does everything I expect/want for email.

It drives me absolutely insane when a company makes an 'enhancement' and reduces usable window space. If I am writing a long email I want to be able to use the maximum amount of window space and not be crammed into something that is 25% of my monitor size.

Link to the HN thread with email clients?