I wonder why this kind of screws are not more popular? Is it really that much harder to produce them or there is some other reason for not being used everywhere? You can use them either with flathead or Phillips head screwdriver, looks like win-win solution?
Finland here.
From personal experience it appears that pre 80’s builds tend to have flat heads and some Philips. After that mostly types similat to Philips. After mid 90’s torx started to appear more and more. After 00’s torx heads started to be a majority and still are.
Have seen some combined screws but they are rare.
Edit: Shit. Meant to post on OP root. Since i’m on waydroid and copy-paste does not currently work, here it stays.