I wouldn't say they're getting rid of them, just not being used as before. 3-62 is an "old" District-Chicago trooper, and probably never had the D5 Car-to-Car channel. As far as the "old" D5-B channel, it appears to be used exclusively for details in the Southwest Patrol area, which makes sense since Troop 3 can run concurrent details in two areas on separate channels. The "old" DC-B is used frequently for details in the North, South , and Middle Patrol areas. I haven't heard much on the "old" D2-B or D2-C talkgroups with the occasional "oops, I'm on the wrong channel". I've infrequently heard the "old" D2 Car-to-Car used with H-541 during a overweight enforcement detail awhile back. I have them all programmed in ID Scan mode to keep track of any changes.