Well, the suggestion did not make this sound like opt-in but like a the new default. I'm not against features that have absolutely no impact on me, so if I didn't need to do this, and DW never prodded me to rather use this security feature, or assumed everybody owned cell phones, and account recovery for me would also be possible without having this cell phone feature, i.e. just with an email as it is now, then I wouldn't mind if others prefer the extra hassle for having this security feature.