Same here. Fastmail is great. The only thing that bothers me is not having a family plan so I can cheaply give my kid his own inbox in due time.
Although to be fair, I welcome competition, and I like seeing people end up with other solutions. I would hate it if Protonmail and Fastmail were the only viable services offering this.
Wait, but Fastmail does have family plan, introduced 2 years ago. Just letting you know :)