Separate Solidity classes from contracts?

Magicians Primordial Soup
1

I’m suggesting that in a future version of Solidity, we explicitly separate classes from Solidity contracts.
That would mean that we could build a contract solution using 1 contract and a collection of classes.
I have written articles about Solidity class features and other Solidity foibles (in medium.com).
In conclusion, I think it would be very useful to have useable classes similar to non-blockchain languages:

class X [is Y] { // non-payable
    constants
    enums
    types (I wish!)
    functions
    blah
}

contract MyContract is Z { // payable
   X x;
   blah
}

Any helpful comments please.