Does Windows 10 not support DVD-R anymore?

Helmut said:

You can't do that with DVD-R it is not a suitable type of disc.
You have to use the second option (with a CD/DVD player, mastered) assuming the Windows 10 way.

DVD-RW, DVD+RW, CD-RW can use the first option, Like a USB flash drive(Live File System). These discs are rewritable.

MS as usual uses it own terms which is confusing, and a useless link.

-R and +R are write once discs, you can write multi-sessions until the disc is full, one write and that is it.

Your old discs "I was able to burn onto some vintage DVD-RW discs I have" are RW and the others -R you see...
It is the type of Disc plus wrong burning method, not the burning application.

If you're referring to what I think, see:

https://en.wikipedia.org/wiki/Packet_writing

It is allowed to use packet writing (which I believe means using it like a USB drive) with a write-once disk. The difference from an RW disk is that if you "erase" data, the space isn't recovered.

Haven't tried it in Windows 10. I haven't used packet writing at all for many years.

#12 That's not what I am referring to.
I said that from experience over about 17 years, and I still use optical discs.

Personally I found that packet writing (InCD, DirectCD, Windows Live File system) resulted in unreliable discs, long term.
So even with RW discs I used the simple standard write whole disc or multi-session. Then to re-use the disc erase the whole thing. Then of course write it again.
Very simple but effective in writing reliable discs R or RW variants.

Technically supposedly not the way to use RW discs as the wear is not evened out, but it has proved best for long term use in reality over maybe 15 years.

#11 "Did you actually read this OP's posts? "
Well I did, that's for sure.