I use both, Android and MacOS desktop. I use the desktop version since it's faster and easier to type using a full keyboard and if I want to send some stuff it's also easier. Obviously if I want to send a picture I take it on the phone and send it on the phone but other stuff It's easier to use the desktop. Horses for courses.
The desktop version won't work unless my phone is on and running WhatsApp and is on me or close to the laptop.