Could fflib_QueryFactory now allow multiple nested subselects?

[phil-apexology]

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The method private fflib_QueryFactory setSubselectQuery(Schema.ChildRelationship relationship, Boolean assertIsAccessible) has a check that prevents a subselect being added to a subselect - e.g.

if (this.relationship != null){
   throw new InvalidSubqueryRelationshipException('Invalid call to subselectQuery.  You may not add a subselect query to a subselect query.');
} 

Given we can now have upto 5 levels - e.g. https://help.salesforce.com/s/articleView?id=release-notes.rn_apex_5level_SOQLqueries.htm&release=250&type=5, would it be as simple as removing this check? Or at least enhancing this check to prevent more than 5 levels?