Here’s hoping you can use it with an actually private email service in the future.
I would like to add support for IMAP and JMAP in the future, which should broaden the scope of services you can use this with!
I would much rather have my emails sucked into some developer’s private server than sit on the server of a large multinational that provides them to the federal police and national military without warning, notice, just cause, due process, or meaningful judicial oversight.
Doing gmail-first is the error, and is an endorsement of a society without privacy or the rule of law.
You have produced an espionage-only email client.
We can’t just go about our lives, pretending gmail is okay because it’s popular. Using gmail and building in its ecosystem is an explicit endorsement of gmail which is part of an illegal military spying program.
They aren’t different things, as much as I imagine we’d all like them to be. To endorse gmail is to endorse illegal military spying, and is to endorse a society without privacy.