You can install directly from 3.41. Don't ask about that, apparently people get really heated over it.I didn't follow PS3 scene for more than a year, and I'm still on OFW3.41
it seems there's only one CFW with a setting to enable/disable Cobra, instead of two different firmwares. That's easier to decide which one to install
I still don't understand all the needed steps and purpose (like QAFlags, EID0, etc.)
I guess I can install rebug directly from 3.41, I don't need to install 3.55 first?
is QA auto-enabled or need to be done after install?
What about my current homebrew? (multiMAN need to be uninstalled fully before update? I still have v2.0)
I saw games needed patches to run on 3.41/3.55, and patches for 4.21+
Games above 4.21 still require patches, even if the CFW is 4.65?
What about my currently patched games? I'll probably need to unpatch them or does rebug work with 3.x patched games?
cobra/webMAN/PS2 support seems complicated.
You don't need to enable QA, but it's recommended.
You don't need to uninstall multiMAN first, but you're gonna end up doing it eventually since you're far behind.
I still haven't upgraded from their previous release, but it was 4.45 (or whatever) and patches were necessary, so I'm assuming you'll still need them.
Not sure if your currently patched games will work or not, but they'll probably work with another patch (or none at all). I doubt you'll have to unpatch, but I'm no expert in the field.