I understand there is a lookup amount threshold of 12 columns/fields per list.
Since these 12 include the CreatedBy, ModifideBy etc. (see https://blogs.msdn.microsoft.com/spses/2013/12/02/sharepoint-20102013-list-view-lookup-threshold-uncovered/).
This leaves about 6-8 lookup/options for customization (especially if you have some flows running there).
THIS IS A VERY LITTLE AMOUNT OF LOOKUPS !!
I do uderstand this is to avoid heavey quering.
I still hope this threshold will be lifted to at least double!
I think this threshold should be lifted to minumum 30 columns.