Rooted S5 on 4.4.2 - where do I go next?

[tangoman99]

I haven't touched my S5 (G900F) since I rooted it 3.5 years ago. At the time I was careful to retain KNOX.

Now I'm looking to upgrade - found a thread allowing me to put Android 5.0 on it pretty easily but it that the latest I can safely use?

Also, I assume that anything other than flashing a Stock Rom will result in the loss of KNOX - is that something I should worry about given that the warranty on the phone is long expired? Do any apps check KNOX and refuse to run if broken (e.g. Paypal and other Banking apps)?

If I should retain KNOX, what ROM should I be flashing?
If KNOX doesn't matter any more, then is there a debloated Stock ROM available for the S5?

 

[Fear_The_Fluff]

I haven't touched my S5 (G900F) since I rooted it 3.5 years ago. At the time I was careful to retain KNOX.

Now I'm looking to upgrade - found a thread allowing me to put Android 5.0 on it pretty easily but it that the latest I can safely use?

Also, I assume that anything other than flashing a Stock Rom will result in the loss of KNOX - is that something I should worry about given that the warranty on the phone is long expired? Do any apps check KNOX and refuse to run if broken (e.g. Paypal and other Banking apps)?

If I should retain KNOX, what ROM should I be flashing?
If KNOX doesn't matter any more, then is there a debloated Stock ROM available for the S5?

If you are already rooted, a custom OS shouldn't affect it, if the OS wants you to update SU after installation, you may want to look at magisk when you run the OS. Do a nandroid back up before you do this.

 

[tangoman99]

OK - thanks for the input - a few things to clarify:

https://forum.xda-developers.com/galaxy-s5/general/how-to-root-triggering-knox-2nd-method-t2843044
Suggests that to FLash Android 5 WITHOUT triggering KNOX, I need to see https://forum.xda-developers.com/galaxy-s5/development/rom-ane4-kitkat-4-4-2-multi-csc-t2813628

The link is clearly out of date though as the latter is now at Android 6.01, but more importantly, the latter states that Installation is via CMW/TWRP recovery and KNOX is triggered.

Presumably I need to flash the new ROM from within the current ROM - what's the best software for that - I found Flashfire, but it was a post dated 2015.