I think popular is very situational though.

For me I see a lot more dynamic than condensers but I guess if you are talking about what is in like every single IOT thingamabob then you might be right there.

No, you're right. Most microphones and speakers ever made are dynamic. The speakers do function as microphones, by the way. The difference is simply whether you amplify the electricity generated by the vibrations moving the membrane (microphone) or if you send a pre-amplified signal to the copper coil around the magnet (speaker). They work on the same principle, so any dynamic driver can work as a microphone and any dynamic microphone could work as a driver, all just depending on the rest of the electronics they're hooked up to.