Just out of curiosity. I've noticed, that hook_page_alter and similar are missing. How to replace their functionality?
There are hook_node_view and hook_view, but they don't seem to do much...
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Not perfect, but sometimes I use the specific
hook_block_view_system_main_alterhook, fromhook_block_view_MODULE_DELTA_alter.Hello @akarso!
The change log is here: https://api.backdropcms.org/change-records/new-layout-module-implements-...
Basically either use layouts (custom or via UI to place blocks) and if you need to alter code or data on page load use
hook_preprocess_page().