Question

I’ve heard many of the Rabbi’s lectures in which, bottom line, he explained that there are a great many things that can be changed in Jewish law, and that sometimes the practical consequence of not changing the existing situation is far more severe than changing it—for example, women’s testimony and the implications for monetary law and capital law.
Rabbi, can you mention additional topics that we encounter in everyday life where there would be a significant practical consequence if Jewish law remains as it is without adapting to the current reality, and briefly describe why?