By default, Visual Studio 2019 Intellisense uses automatic completion instead of Tab-only completion for all files. On a per file basis, you can "Switch between automatic and tab-only Intellisense completion" using the Edit->Intellisense->... menu option, the toolbar button, and the shortcut Ctrl+Alt+Space.
I prefer the tab-only completion for all files, and would prefer not having to check the state of this setting for each file every time it is opened -- or forget to check and be surprised when some code is "magically" deleted while I'm typing and replaced with something else.
In the end, I just want to set a default state of the "Intellisense completion" setting to be tab-only completion for all files, or for the whole IDE.
Is this possible?