The only time I use PNG is if I'm aiming for pixel-crisp, anything else is JPEG where fitting. I LIKE my PNGs to be pixel-crisp, and the only way to substitute

The only time I use PNG is if I'm aiming for pixel-crisp, anything else is JPEG where fitting. I LIKE my PNGs to be pixel-crisp, and the only way to substitute that I could think of is put PNGs in /lossless and /lossy folders individually. Maybe a quick JS speed test and if possible switch all your lossy to lossless? Would look weird on load without a splash screen though.