Offering CodeBlock line number feature from CodiMD (a flavour of Markdown - The free Open Source version of HackMD) would be nice.
The usecase is straigth forward:
If you want to show line numbers in the Code-Block of your document and to be able to specify the line number it starts from.
This feature is now available by a plugin ( HK Code Block Obsidian plugin developed by Heekang Park).
The plugin is not yet published in the official Obsi-store for external plugins, so you’ve got to install it manually, which is no big deal.