How do you run WhatsApp or Signal without a smartphone? Pretty hard.
If your answer is "don't use them", then you're not living in a country where the vast majority of communications are done on WhatsApp or Signal, good for you I guess.
Access to Signal and Bitwarden are the only two apps I really need daily that keep me on a smartphone. I have tried using a feature phone in the last couple years, but honestly I might as well just not have a phone at that point as almost all my communication is via Signal.
Signal can be used without a phone using signal-cli. You can sign up with it and either attach your account to signal-desktop or keep using signal-cli
Yes that's fair. I have a an old iPhone without a sim that I use as my master for those apps, but I keep it in a drawer since the desktop apps work fine. Funny enough the phone the app is installed on doesn't have to be the same phone you use to register by number, so the number I registered with is my flip phone