How can i store multiple single and multi Colimn text without running up the metafields limit?

I’ve contacted a Shopify representative about this issue and he says that this is a flaw on shopify’s end. I want to make a multi niche store but I don’t want the same description to show up on every product. I’ve tried using metafields but the limit is only 20? How can I store all of my product descriptions (single and multi column) on to metafields without being stuck to only storing 20 metafields?

Consolidate the Information. Instead of using separate metafields for each piece of information, consolidate related data into a single JSON-formatted metafield. This allows you to store structured data within a single metafield.

Suppose you have a product and you want to store multiple details like a detailed description, specifications, and care instructions. Instead of creating separate metafields for each of these, you can create a single JSON metafield that contains all this information.

Example JSON Metafield:

{
  "detailedDescription": "This is a detailed description of the product, covering all aspects.",
  "specifications": {
    "material": "100% cotton",
    "dimensions": "30x60 inches",
    "color": "Blue"
  },
  "careInstructions": "Machine wash cold, tumble dry low. Do not bleach."
}