but there is.
VSCode core may be open source, but the plugin marketplace certainly isn't.
So if you for example use VSCodium, you don't have access to the plugin marketplace and eather have to use an alternative or manage your plugins completely manually on the filesystem.
So what? You use the plugins available on the platform you use, that's standard practice. Would you complain Sublime Text plugins are not available on VSCode? Or emacs plugins are not available on vim?
This is not lock-in, just a different feature set.
