Please… Make a solo in place option… Please…
+1
I don’t care about it, never used it and don’t need it
It Is Useful!!!
Yes, please. It’s very needed for rehearsal a soundchecks.
I’ve never used SIP before, too.
I’ve always been happy when the SIP button on some analog mixers was behind a cover flap, so you couldn’t turn it on. 
what are you using this for?
Studio?
I would like to have this function mainly for virtual soundchecks. Often I want to pick one specific channel from my mix to check and edit this channel. At the moment I have to mute all other channels in order to hear just one channel. A SIP function would speed this up extremely.
you can simply use the PFL function.
Alternatively, if you want to have this function on the PA, you can route the PAFL output to the PA for the soundcheck.
when you then press PAFL, you only have this channel on the system.
You only need SIP if the PAN function is important.
During virtual soundcheck I of course want to hear the mix and single channels on the PA.
To rout the PAFL bus to the PA-Outputs is not really an option, as for example then PA tuning made in the desk is not audible anymore. Furthermore I have to change the output routing everytime I want to hear a single channel and when I then want to hear the entire mix including panning again. Of course I could do this with scenes, but an SIP-function would simplify that a lot in my opinion.
well, virtual soundcheck only works if the backline is very quiet.
but of course, if you send PAFL on the PA, the settings in the output matrix are bypassed. I accept that argument.