I've recorded a video of gameplay on 1.5.5 pre (SDL3) with the same video options as previously (but with no r_skippostprocess=1 this time - maybe that's because the video stutters at times). Some shadows seem buggy (that's mostly visible when flashlight is on) and the reflections on weapons are somehow trashed. Other than that - SDL3 has massively improved game stability. I haven't been able to crash it so far.