Answering on a similar fashion to your answers, although I agree on all three.
- In case something happens or if I want to make a fresh install e.g. on usb and boot from there, can I reinstall the patched image with which the wifi works? No. Please note that I asked if I can boot from usb with the current status on my thread earlier today but got no answer.
- 11.0.3 updates iwd and connman. Last summer (from late May to early September 2022 actually), I tested and updated through every single nightly of le 11 on my rpi3b+. The one thing that made me give up was the inconsistency on the wireless's behavior (connectivity mostly), which continued all the way to 11.0.2. To be fair, I borrowed an rpi3b+ from a friend on late April (of 2023) and tested it again, but the issues were still there, so it was not a hw issue on my end.
Sadly, that thing was also present (in a different form, but still related to connectivity) on my hw with the nightlies of x64, which I tested for ~1 month before also giving up and it was also present up until 11.0.2 too. Tbh, that iwd + connman combination was the buggiest thing of le 11 and I keep my fingers crossed that it is fixed now on 11.0.3, because I tested it 1-2 times and it worked with no issues.
On the other hand, the... "way"* of the patched amlgx image discouraged me from testing if its wifi had similar issues. If there is an issue with that too, will I get the update that fixes it? No.
- Likewise, will it get updates for the dozens of packages that 11.0.3 updates to their new versions, e.g... kodi at 20.2? Also no.
So yea, it is a big deal for me, sorry.
* "Way" = having to use a patched image file to get wireless working, because it does not work with the stock one.
---edit
I spoke too soon for the underlined part, it still has the same issue. Goodbye le 11 on x64 as well, see you in le 12.