For large/many linked records, ServiceNow has a better UI for their "Linked Record" equivalent where rather than show the linked records in-line as a field as SmartSuite does, they show the linked records as "tabs" that you can select that allow you to see the whole linked table.
This is helpful because today in SmartSuite with a long list of linked records, even in full screen view, you have to use the scroll bar AND it takes up a lot of real estate / makes the record view longer. Adding collapsible Sections just hides the tables.
I think this "tabbed" view could be enabled by adding an Option under the Linked Record called "Show Linked Record Table as Tab".
Probably more to consider on how you then organize the tab on the page, but would be a much faster way to get to linked tables and make SmartSuite more "Enterprise" ready in my view. QuickBase has as a similar approach.