It is for me as well. It's an obscene plan. They should have plans for us normal humans :)
But having burnt my fingers couple of times I need to be with a provider who has some sort of "real" and responsive support (and accountable) and that costs money so there's that. For me EU is not a condition, neither is e2ee (as long as it's E at Rest), but I understand it might be for others. I hope mailbox is good for you and unless you need some support it will good. There were no outages or any general things breaking during my usage of many years.