How can I check where a layout is being used?
Waiting for Layout Builder Settings Report to add a report for sections.
Search inside config dir: grep -rni "layout_id: twocol"
Questions
How do you make uploaded files private?
Set the upload location to private on the file field.
How do I use HTMX in Drupal?
HTMX was added to Drupal core in 11.3.
Take a look at the HTMX Dialog module.
How to create cropped instance of existing image?
After uploading an image, is it possible to reuse it as a cropped version somewhere else?
Are forums still useful in addition to group content?
The forum module has been removed from core.
Is it still useful, or can it be replaced with group content and comments?