Only 5th and 6th to be believed. Every time a manufacturer says vague descriptions like "security" or "performance" fixes, be wary - they probably removing perfectly working functionality for "reasons".
If it was something that really added value to the user they would mention it specifically (like on the 5th and 6th items).
I have a Dell laptop that mentioned such vague "improvements". After updating the firmware I couldn't undervolt anymore. Luckily I was able to downgrade.
> Every time a manufacturer says vague descriptions like "security" or "performance" fixes, be wary - they probably removing perfectly working functionality for "reasons"
I have a pair of WF-1000XM3s and this is painfully true. ANC was brilliant on these until I naively updated, and whoosh - instantly and grossly degraded ANC, to the point I previously almost didn't hear people talking at distance, keyboard chatter, city traffic etc. and now I do, no matter the app settings.
I wanted to upgrade to the in-ear XM4s, but after this? NEVER again Sony. At least for portable audio. I got instead a pair of cheap QCY HT07s (then $28, now ~$20) and got quite surprised with ANC performance on these: easily beats the crap of the XM3s-on-latest-firmware, and gets close to the previous one in audio quality. Which is a lot to say about Sony "updates".
* Enhances the security features of the system software
* Improves Bluetooth connection stability
* Improves the hands-free calling quality
* Fixes an issue where the headphones cannot be paired on a Windows computer
* Fixes an issue where, when there are 2 Bluetooth devices connected at the same time, the connected devices repeatedly disconnect and reconnect
* Improves general performance of the headphones