We could deduce from this that the new system is either more efficient in cooling or the SOC produces more heat, given that's the same SOC so the new cooling (or firmware) the new PS5 is able to take more heat than the old one.
Stop feeding those philistine YouTubers who don't have a clue about anything.
That's not how cooling works. A higher exhaust airflow temperature can mean several things: less airflow (meaning the air has more time to heat up while passing through the heatsink); a warmer heatsink due to less thermal mass and/or surface area; a warmer chip putting out more power. What it
can't mean is the heatsink is transferring more heat to the air at the same airflow without the heatsink temperature increasing - thermodynamics ensures that. It is not indicative of a more efficient cooling system if one adheres to common understandings of (consumer-facing) cooling efficiency (i.e. being able to extract as much heat as possible with as little power consumption, noise and design issues/complexity as possible) - cooler exhaust air is indicative of the heatsink efficiently dissipating its thermal energy input. Given that there's no chance of a power draw increase for the SoC (unless yields have suddenly gotten worse, which ... nah.), that means either less airflow or a hotter heatsink. Given the smaller design of the heatsink and retaining at least one of the original fans (likely all three for a steady supply), a hotter heatsink is by far the most likely answer due to there being less surface area and less thermal mass. A hotter heatsink also generally means a hotter SoC (as thermal transfer is more effective the larger the thermal delta, the heatsink getting warmer will cause the SoC to heat up as well) - though by exactly how much is impossible to extrapolate from external data. It's likely a relatively minor difference overall - and as I said before, Sony most likely has all the data they could ever want in order to make sure this design is sufficient to keep things running.
It really doesn't matter how you are calling them - for me they are "next-gen". I don't think so that's the topic here anyway. It's nitpicking.
Well, you're entirely welcome to your own personal definition. For the world and console makers, these exist and have been on sale for quite a while, so they are by the very definition of the word
current. Whether they are
next for you (and a lot of other people) is rather irrelevant. And sure, it's nitpicking, but it's also worth thinking about how we actually speak of things. Sticking to an outdated term just because we're used to it is a bad habit.