> Another messaging channel is fine of course. You could replace email address by a phone number for SMS/WhatsApp/Signal. Is that more secure though? Would a user rather give your random app their phone number than email address?
Yes! Even insecure SMS is more secure than email. You know why? Because everybody and their mother is logging and inspecting email, I see people's reset codes and links all the time to everything from banks to porn sites! Many messaging systems including sms have no "account" to get phished either so while other attack vectors like malware infection remain (as with email), credential phishing as an attack vector is eliminated when using these messaging apps. Yes, many people in non-US countries use whatsapp,wechat,facebook or viber but don't even have an email until some retarded app forces them to get one just for the retarded registration system (in some, "internet access" even costs more with just FB,viber,whatsapp being the cheap default). Many gen-Z'ers also use messaging apps over email, it's like asking them to use aol or icq! And it is very convenient to block unwanted senders on those apps if you decide to sell their contact info or spam them with email (where with email it varies greatly with email client and provider). If you go by the numbers the majority of internet users are coerced into using email because people who design apps stuck in the 2000s.
> Secret questions are usually very much not secret (less safe than password). They are way easier to uncover about a person, and still very much subject to re-use across sites.
Depends a lot on how you implement them, again if you read my comment before replying I suggest pictures,emoji and patterns, you can ask them just about anything so long as it isn't information about them others can also learn easily. It is no different than passwords themselves being reused across sites, except here you control what easy to remember questions and answers to ask like "what are your too three emoji from this list" or "create a passphrase from a combination of these common words below", again, not a difficult problem unless in 2022 your assumption is there are many internet users incapable of remembering anything more than their mothers maiden name (who even knows that shit?) or whatever in which case there are plenty of other ways to provide challenges.
> I am telling you that I haven't found anything as good and you reply that I must not have taken a single minute to think about it. I guess there's nothing more for us to discuss.
You literally ignored the possibilities I listed, if you are disagreeing with my comment in ignorance of what I said then yes, let's not waste our time here.