Replies: 0
More of a discussion point than a support question: are there actually any benefits of adding link preload tags in the header when there is no HTTP/2 support? It feels just as pointless as trying to push a whole stack of letters through a very small letterbox at once.
By the way, I tried
add_filter('http2_render_resource_hints', '__return_true');
to test this but it does not seem to have any impact. No link tags are added to the source head section…