VBox 6.1.0_RC1-135185 dev snapshot for the upcoming 6.1.0
VBox 6.0.15-135093 test build for the upcoming 6.0.16
Msg. at boot process: “vboxsf_ Old binary mount data not supported, remove obsolete mount.vboxsf and/or update your VBoxService.”
I don’t think that will change as long as vboxguest modules are integrated in the image. To my knowledge with kernel 5.4.x this is no longer necessary. vboxsf has been integrated in 5.4 as the last vboxguest module so far.