I've accidentally used this feature a number of times, and it drives me nuts.
The greatest feature about Gmail that not enough use is 2-factor auth (even though it is not limited to Gmail- other web-based mail services provide it); it is a pain in the arse, but after you get hacked once or twice, you'll be happy you did it. Popular Saas apps are prime targets for being hacked. It may mean they are safer, but they are also riskier to use. If you're not using 2-factor auth, you should probably not use Gmail, unless a hacker taking control of your account wouldn't bother you or your contacts.
The greatest feature about Gmail that not enough use is 2-factor auth (even though it is not limited to Gmail- other web-based mail services provide it); it is a pain in the arse, but after you get hacked once or twice, you'll be happy you did it. Popular Saas apps are prime targets for being hacked. It may mean they are safer, but they are also riskier to use. If you're not using 2-factor auth, you should probably not use Gmail, unless a hacker taking control of your account wouldn't bother you or your contacts.