Vertex Search for Retail Limits

[basivaram]

What are the limits for the following in vertex search for retail:

1. Number of unique product attributes across the catalog? In document its mentioned as 200 attributes/product. Can each product have its own unique 200 attributes?

2. What is the maximum number of facet values for the entire catalog? In document it's mentioned as 400 values/product.
And 300 is the maximum number of facet values that can be returned as part of the search response. What if there are 5000 facet values for a facet? Is it possible to increase the 300 limit to say 3000 ?