RTR radios often have analog adjusters which need constant adjustment, or have digital buttons but no display to tell you what the settings are. They often also lack basic adjustments like dual rate. A radio like the 3PV meets the requirements of everything you need in a radio with adjustments and latency, but falls a bit short in ergonomics. There's diminishing returns spending money beyond that, but there's value in buy once cry once with the higher end radios, they can last you many years.