This really depends on a few factors. Such as the amount of characters or objects reflected excluded or included, the complexity of the scene etc.
SSR have terrible setbacks (understandably) but this does not mean we shouldn’t have the option to choose. The issue of reflections has been going on for a long time in these forums without much of solutions. I believe there was a person who is a developing a plugin for this. Understandably the performance usage is heavy, but then again will it be really heavy if you choose to only reflect the hero object in the scene and leave everything else to SSR or static Sphere reflections? I think not perhaps. I think that kind of flexibility will be very helpful.