Sooo about Vox and Alastor...
The Radio Demon controls radio waves. Guess what?
Over-the-air television: Television broadcasting throughย radio waves, from a transmitter (TV station) to a receiver (TV antennae)
Satellite television: A TV signal transmitted byย radio wavesย from a satellite.
Cable television:ย Radio frequency signalsย transmitted via cables
Until the early 2000s, TV signals were entirely transmitted through analogue signals: for decades, the original television technology only worked thanks to RADIO technology.
Those antennae on Vox's head? They're 'rabbit ears'!! Dipole receivers, meant to intercept radio waves broadcasted by TV stations, convert them to radio frequency electric currents, and send those to the TV via a radio currents transmission line, to be converted and processed to produce pictures and sounds.
It makes perfect sense for Vox and Alastor to have been "pals". Alastor calls him an " old pal" mockingly, but there's no way Vox would have been able to implement any kind of TV technology in Hell without the help of radio technology - technology that Alastor had control over. For decades, TV was literally radio with pictures. Alastor used to tolerate him (despite Vox encroaching on his territory) at worst, but might have supported him at best!
In my opinion, the beef between them comes from Vox's transition from Analogue to Digital, aka the digital switchover.
When Vox asked Alastor to join his team, it's possible he suggested Alastor switches to digital radio broadcasting (better sound quality, less transmission power required, a compressed digitized signal that allows for more radio programs in the same radio spectrum...). Of course, Alastor didn't care for that.
Was Vox's transition (partly) motivated by a desire to be more independent from Alastor? In any case, he's certainly not that much more independent now: streaming television and the streaming platforms & other services available on digital TVs depend on internet connectivity. And Wi-Fi uses radio waves.
In other words: Alastor's radio waves still live in Vox's TV head rent free, in the most literal way possible :3