I am using Audxeon D1680. It has bluetooth but it is not able to play for both source at the same time. ie HU + direct bluetooth. Maybe some more expensive DSP can play both inputs simultaneously.

For me I connect my phone direct to the DSP's bluetooth as the quality is miles better than going through HU.

To control volume/next track, you can press volume button of your phone, OK Google Hey Siri, control from smartwatch or get a small bluetooth remote control and stick it somewhere convenient.

Only sounds you will lose is parking sensors beep and auto parking bell sounds. Other warning sounds are not from HU and will continue to work.

Which model are you looking at? Seems quite expensive.

I am using Audxeon D1680. It has bluetooth but it is not able to play for both source at the same time. ie HU + direct bluetooth. Maybe some more expensive DSP can play both inputs simultaneously.

For me I connect my phone direct to the DSP's bluetooth as the quality is miles better than going through HU.

To control volume/next track, you can press volume button of your phone, OK Google Hey Siri, control from smartwatch or get a small bluetooth remote control and stick it somewhere convenient.

Only sounds you will lose is parking sensors beep and auto parking bell sounds. Other warning sounds are not from HU and will continue to work.

Which model are you looking at? Seems quite expensive.

Will not work if you downloaded and updated to version 617/618 after 2-March.

As for the steps, are you referring to advance method which for installing own choice of app? This is also for those updated before 2-Mar.

Yes, if you buddy enough with SC maybe and just maybe they can manually update the previous 617/618 for u.
Yupe.
Same way as version 581/582 removed, but this time seem like in a rush, the version didn't change from 617/618.

You may automate some steps. I uses Tasker to shorten steps 2-6.
Preparation (setup once only):
1. Add script in Tasker to start Hotspot whenever Bluetooth to "PROTON" connected
2. Connect BT on phone so that next time when IHU started, it auto connects to IHU.
3. On IHU, turn on Wireless network and connect to phone's hotspot.

After set up completed, you just need to:
1. Start engine and let IHU starts. (Phone should auto connect to IHU's BT, then phone auto turn on hotspot. IHU auto connect to hotspot since it remember the password.)
2. Open Media app on IHU (to enable steering control)
3. Plug in USB cable to start AA. (If you prefer AA wireless, replace this step with opening AA app on IHU).

Is the apps - Disney/Netflix Installed using silentshadow88 method? If yes, you need to remove using back his method.

His method got slightly different from xeon1989, abit more risky and removing or installing wrong file/apks could resolved in boot loop.

Best that you read the details on his GitHub.
https://github.com/silentshadow88/PX50EntApp
Link to the Instructions for removal also there.

For xeon1989 GitHub, you can refer to
https://github.com/xeon1989/Proton-X50-APK-Installer-ATLAS

Technically it should not, but some apps will run in the background even though you didn't open.
Additionally, if you IHU running out of space also will cause issues.

For optimization, you can also consider the optimization script from Xeon1989 GitHub.
https://github.com/xeon1989/Proton-X50-APK-...Optimization.md