Yep! I loved the FLIRC with my previous Pi 4 so bought one for the 5. Temperature sits at 35 degrees idle. A stressberry run pushed it up to 67 degrees. No temperature recordings for the power management chip though.
I had just upgraded from the Pi4 4gb to the 8gb version as the 4gb version was throttling by using a swap file when moving a large amount or large files about, when on holiday and came back to see the Pi5 announced.
The Pi4 in the flirc case does what I need it to do for now, which is basically a headerless jump box.. that I can set stuff off downloading from and jump on to it remotely and do "stuff" on other devices on the network when away from home; thou I tend to work from home now a days.
Good to see that the flirc case does it's job correctly as having a passive cooling system is one of the main reasons why I use a Pi rather than a NUC of some sort..
Still debating on getting the Pi5 at the moment, it just seems to be a habbit of upgrading now a days as I've had at least one of each model so far. I may wait to see if a 16GB version comes out.
Also the NVMe hat/base would be extremely useful in my scenario but the flirc case and most passive cooling cases don't offer much support in terms of hats/bases.