Support of OptiFine_1.7.10_HD_U_E7 (old MC version but with powerfull modpacks)

[Ngar1]

Vivecraft supports only the very old Optifine version "D1" which is since longer time incompatibe with serveral mods.
Ideal would be the support of OptiFine_1.7.10_HD_U_E7, or as minimum OptiFine_1.7.10_HD_U_D6.

I play GregTechNewHorizons Modpack with very active modding community, but they cant help to support such old Optifine version.
This modpack is supported since 7 years, with many new release and new (& exclusive) mods per year. 1.7.10 is "old", but with newest mods newer MC version is not beats it.

Is there something to motivate this update?

[Espergium]

1.7.10 is discontinued. There are no updates.

[Ngar1]

Yes, I know and had been written. The question is, what would motivate to do it?