Can absolutely confirm that.
However, there's place for both Gmail and FastMail. Just know what you pay and what you're entitled to get for that price.
- Created an email address at my own domain and forwarded it to Gmail.
- For the last year or so, started using it as my email address and changing accounts to use it as it came up.
- Signed up with FastMail and set up my domain's MX records to point to it.
- Still checking Gmail for stragglers to change over to my new address.
- Eventually will set Gmail addresses to forward, but didn't want to rush that so I remember to just make stuff not go to Gmail.
The hardest thing is getting used to folders again vs. labels. But FastMail has everything like filters and aliases and two-factor auth to an extent that... honestly makes Gmail look kinda basic.
The advanced features of Gmail were the most compelling reason to switch to it, but FastMail takes them a lot further.
When I did this (from @gmail to @mydoman on google apps), I set up a filter to star/label anything forwarded from the old address, so I'd see an update was needed at the sending service/person. Perhaps the same could be done with FastMail.
Email is a big part of everyone's lives, who made an online account somewhere. Not to mention if they paired real identity and/or money to those accounts.
Also nothing as good on mobile. But fastmail search has been okay, I'm not too handicapped.
Actually the strangest thing I find amazing, is FastMail's endless scrolling being basically magical. I can scroll through over 2500 messages in a folder of mine, top to bottom, instantly. It's not paginating, it's not locking up at the bottom of the first 100 to stop and load more. It :just works: in their UI.