From what I have found so far only the order of the filters matter.
But, does the order in which the <field ...> are added matter?
I'd prefer to alphabetize and group by multiValued but not clear if the order has any significance to Solr.
This is against Solr 4.x currently but I will also be working on Solr 8.x stuff here soon enough.
So, does the order matter on any of the Solr versions?