I disagree, probes and ssr are great for glossy surfaces, or for something with distinct shaped mesh, but for flat smooth surfaces (mirrors, glass planes), its useless at times
for me, this isnt acceptable
I mean, feel free and try to create a realistic mirror surface, or a perfectly smooth floor that reflects chairs and tables sitting on it.
as far as i know, it isnt possible with SSR and probes. Not without a SceneCaptureReflectActor