Support for HW accellerated ETC2 on OpenGL 4.3 +

ETC2 texture compression shall be standard from version 4.3 but is ETC2 really supported by HW in Nvidia drivers. I get a huge stall on use of ETC2 textures even if i send up ETC2 compressed data and generated mipmaps

SW emulation in 2020 ?

Any answer from nvidia driver dev ?