........ if your transmitter battery goes flat, your truck goes failsafe, which is a lot safer than it would be for an aeroplane.
You could not be more correct on that one!! (Although I DID once have a truck lose Transmitter signal - and that Rig fired straight into the Colorado River!!!)
That was still running AA Alkaline Batteries.
Since being exposed to LiFePo4 Batteries, I've
NEVER had an issue. I also with Ground RC, run a Futaba 3PV and 4PX - BOTH with alarms, triggered by lower discharge as well as lower voltage! (I USED to have money).....
I have an older Flysky GT-T6 Radio for my budding Aircraft Hobby. I can't tell you if it has ANY Alarm at all!!! I can't get past the horrible Chinglish.
I've also seen that C ratings on LiFePo4 Batteries have increased in recent years. I still wouldn't power a Vehicle..... But when you get into the larger, 8+ Channel Radios, does C rating matter as much?
Are they going to draw THAT much current, that a Lipo is necessary?