Good points. Digital Trunking is NOT like scanning frequencies. The most commonly used receivers for P25 Trunking are quite capable of ignoring ENC. As a result, including them in a favorites list has practically zero impact on the efficiency of the monitoring.
Correct. In fact, I don't believe any program will decode (not decrypt) encrypted audio. If a program does, it's usually a result of a bug, and sounds like a robot having a stroke.
Some programs used to decode them and play the scrambled audio, but since have been updated not to.
I use SDRTrunk, this will decode the encrypted channel and log, but not playback any audio. (There's a GitHub branch for ignoring ENC)
I don't think Unitrunker tunes to ENC.
DSDPlus has options to ignore ENC, but doesn't do it by default.
My SDS100 ignores encrypted, but sometimes it will briefly tune to it and immediately start scanning again, so quick that I barely see it show up on screen. But a reboot fixes that.