The advantages Gmail had when it arrived on the scene just don’t exist anymore.
We have to remember that when Gmail was released, email providers were stingy on storage and decent web mail was unheard of.
Now, if you run over to a paid alternative like FastMail you’ll actually have a faster/better webmail experience.
I also think everyone should use email on their own domain so that it’s easy to kick your provider to the curb if they go downhill. As long as you own the domain you can do whatever you want.