H265 adoption has been hobbled by complex patent agreements and expensive licensing fees. it’s been estimated to be nearly 7x the licensing cost of H264 which is widely adopted by hardware/sofware/browsers. so i think i’ts not a great choice to pay expensive fees only to find out it doesn’t work everywhere? it seems like they’ve tried to reign in costs a bit with some modifications to the fees but Nuke doesn’t read it either and AV1 (which would essentially be royalty free) is on the horizon as well. Oddly it seems the entire industry is influenced by the surveillance camera market which seems to be adopting H265 finally… who knows… i rarely need to deal with H265…