[wjoe]

It takes zero effort to package Electon apps for Linux, there are plenty of tools available that will package it for all platforms with one command.

And so far, I've not seen any differences or platform specific bugs.

Sure, you'd expect a big company like WhatsApp to do QA testing on every platform they release for, but it's a shame that even with the barrier of entry is so negligibly low, that they still won't provide a Linux build. Even if it's just for the latest Ubuntu LTS that's fine, other distros can repackage it themselves.