But it's important to realize when it's not practical to pay for more selectivity. Good commercial handhelds have enough selectivity to allow full-duplex operation by one operator, with a few feet of antenna separation. Good mobiles do better than that. If that's not enough desense protection, there's other issues at play. There's no improvement to be made if there isn't an issue, so it's just wasted money and/or lost functionality. CCRs work just fine as transceivers for 99% of the population. Yes, they don't work in the busy RF environments found at an enthusiast's base station, a command post, or when working near other operators on different in-band channels. They're cheap, show people what the hobby can offer, and include a lot of features (like FPP and ridiculous channel capacity) that new operators need to find their niche within the hobby and understand what parameters need to be configured to operate cleanly on someone else's system. And when they break (probably due to a novice operator blowing out the finals or dropping it), it's not a big investment being lost. They exist in the market for a reason: because they do work, unlike what the topic's title implies. They wouldn't sell if they didn't. It's important to understand their limitations, but they're not as severe as you're making it out to be.