SONY RX100 IV - something to watch out for...

Thought some people might be interested to know:

http://www.eoshd.com/2015/08/sony-rx10-ii-review-final-conclusion-and-introduction-to-its-smaller-brother-rx100-iv/

The article is mostly for RX10 II, but it also mention the RX100 IV:

- S-log2 base ISO is 1600

- 4K video recording will get overheat warning

For a 1" sensor, ISO1600 probably will have a lot problem, but then does people use S-log2 underwater?

If I read the article right, after record 4K video for 5 minutes. the next time you can only record for about 2 minutes before the overhead warning come up. So the question is, if the camera is in the housing, would the heat issue become worse since heat dissipation would be a lot slower in the housing (especially in acrylic housing like Ikelite).

Worse in plastic housing as it is an insulator. Metal housing would conduct the heat out as the camera is warmer than the surrounding environment

Any recent experience on overheating in polycarbonate housings? I plan to get a Fantasea frx100...