Please note that Nvidia GPUs will no longer be supported as per LibreELEC 10...
Nice to know it.
I think, it is not problem. Libreelec 10 will be actual since 2020. And at least until version 11 (2021-2022?) will be still able to use version 9 for add-on compatibility.
I do not understand exactly, but it is written somewhere that VDPAU can operate as a VAAPI subdriver.
Canceling support for nVidia graphics is a shame because nVidia makes the only true 14nm graphics for the HTPC - GT 1030.
But I think it will not be so bad, because at that time, almost free (<10 USD) to get used second-hand Intel UHD processor boards.