Why not use x265?
Often the increased encoding cost does pay for the reduced bandwidth cost. And that assumes you can navigate and afford the HEVC license.
Some clients only take H264, depends on what you're delivering to. Often for web media you end up having to serve [h264, h265, av1], which is a real pain
Often the increased encoding cost does pay for the reduced bandwidth cost. And that assumes you can navigate and afford the HEVC license.