Remove the Disallowed areas from the Kossel and the Kossle Linear Plus. They cause disallowed areas to appear within the build area of the build plate. They were also designed to be off the build plate.
With the changes from https://github.com/Ultimaker/Cura/pull/15692 logic regarding the exclude materials printer setting changed. It has never worked properly before. Now that it works properly again a ton of materials were excluded that were never intended to be excluded.
As we can never be sure if an exclude material was intended or not we decided to be pretty agressive in removing exclude materials. This way the behavior is closed to the behavior prior to the exclude material fix.
There was one case were we decide to leave an exclude material in. If a printer has a material diameter of `175` *and* the material would specifically specify the `175` substring (e.g. `dsm_arnitel2045_175`). When this is the case we were pretty certain it was intended to exclude this material.
CURA-10599
We wanted to select an extruder based on wether or not it has support-material, so that the user doesn't have to think about selecting a support extruder any more and in most cases, can't forget anymore either. The formula present in fdmprinter to do that was not only an unreadable nightmare, but also very slow. We decided to pull most of that functionality into the settings-function machinery instead (but just a bit more generic so other properties can be selected, not just 'material_is_support_material').
done as part of finishing off CURA-10643
We're not sure why this introduces a boatload of small segments into the infill, and we're out of time to try and fix this before the beta. Re-introducing after the beta seems like a bad idea, so this'll have to wait until 5.5 unfortunately.
Done as part of fixing for CURA-10500, but for the original Small Skin Area feature, see CURA-10201. For the ticket to (fix? and) reintroduce the feature, see CURA-10670.
Rest Preference
"Force Only Buildplate" can be "On Buildplate when possible",
Because Support can be created everywhere but as much as possible starting from the buildplate and in some case we can have some support starting from the model..
"On Model If Necessary" can be "On Model If required",
Because support can be created everywhere and if required you can have support starting on the model. And Sometimes Required means they start on the model because you have more direct or simple support if you start on the model.
As suggested by @5axes
