"so much so" meaning in English

{
  "etymology_text": ": so much so < → δείτε τις λέξεις so, much και so",
  "forms": [
    {
      "form": "so much so"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Ιδιωματισμοί (αγγλικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "He is rich, so much so that he doesn’t know how much he has.",
          "translation": "Είναι πλούσιος, σε τέτοιο σημείο/τόσο πολύ που δεν ξέρει τη έχει."
        }
      ],
      "glosses": [
        "σε τέτοιο σημείο, τόσο πολύ"
      ],
      "id": "el-so_much_so-en-phrase-0Alq9zyl",
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "so much so"
}

{
  "etymology_text": ": so much so < → δείτε τις λέξεις so, much και so",
  "forms": [
    {
      "form": "so much so"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "Ιδιωματισμοί (αγγλικά)"
      ],
      "examples": [
        {
          "text": "He is rich, so much so that he doesn’t know how much he has.",
          "translation": "Είναι πλούσιος, σε τέτοιο σημείο/τόσο πολύ που δεν ξέρει τη έχει."
        }
      ],
      "glosses": [
        "σε τέτοιο σημείο, τόσο πολύ"
      ],
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "so much so"
}