Windows Insiders が気に入った機能投票
ダークテーマは3位なんだな

Windows Insiders vote for their favorite features
https://insider.windows.com/ja-jp/community-news/windows-insiders-vote-for-their-favorite-features/

Windows 10 October Update ? what Windows Insiders like most
#1 ? Block suspicious behaviors
#2 ? A better Notepad
#3 ? Dark Theme in File Explorer