I agree, why put all your eggs in one basket? especially if the better alternative is cheaper.

If anything happens to your proton account, and you rely completely on their services, you could lose everything you have in your digital life, like 2fa codes, passwords, emails, photos and files, whatever else. Just like if someone in the google ecosystem lost their account, they'd lose their entire life almost. So it doesn't really make sense to me to pay more money, for a risk as big as that. I mean, convenience? they're all separate apps anyway. It's no different than using tuta mail, proton drive, bitwarden, and mullvad VPN. The icons are just different on your home screen.