I know we have had these discussions before about leaving computers on and what not, but I'm curious as to whether big installations such as Abbey Road, or the various movie studios leave their large Neve or SSL consoles on all the time?
Yes. The risk comes when powering these things up. Our 96 channel Neve has 3 PSUs, bargraph PSU, a couple of Flying Faders PSUs... Powering up could blow any number of circuits on cards that are now unibtainium.
And something usually goes a little funky with the FF soft switches that has to be cleared. Not worth the risk and avoided at all costs.
At my last place we had an SSL 4000 G+ that we shut down every night, and restarted each day with no problems.
On the contrary, at my current place we have a 9000J and a 9000K that we leave on every day. We shut them down when Sandy came through as a precaution, and had some problems when we booted them back up...