At the moment I just use Zed, or I imagine I'd be fine with Sublime. When I used Jetbrains/VSCode, I would grab Notepad/Notepad++ when I didn't want to wait for them to open, set up a project, etc. But if something 'heavyweight' is quicker than notepad, and the features don't get in my way, I don't need anything else. In fact I still appreciate the extra functionality with those one-off text/data/scripts - format, regex replace, diff, occasionally even LSP like shellcheck
mspaint.exe is quite likely to have at least one code execution vulnerability if one opens a malicious file, but I bet it's very safe against remote attack :)