> They are in the process of switching,

Nice! Do you have a link with the progress of this? Maybe in a mailing list or something. I can't manage to find it

Also, do you know whether grub plans to support luks2?

And maybe even veracrypt - ok this one is unlikely. (cryptsetup can read veracrypt just fine and the Linux kernel copes with it, maybe it's a matter of porting this code to grub? One issue is that grub would need to embed the number of iterations of the key derivation function somehow - the thing veracrypt calls PIM - because unlike luks, veracrypt doesn't store it in a header that can be read before unencrypting)