I just dodged a bullet –
I was going to make a conlang with both labial–velar consonants and clicks.
I realised in time that having both isn’t right. You choose one or the other. No natural language has both.
There’s a more general lesson here: across phonetics, grammar, etc., there are various features that don’t get along like grass and trees. Another example would be having a very strict word order (like creole) and also a very strict case-system (like Latin). Any more you can think of?
You could have a strict word order and case system. It would just evolve into a formal register, used to denote authority, ritual or similar, as casual/spontaneous use flowed into the redundant expressive space walled off by the rules. (Perhaps beyond a given level of informality it would become something disreputable, like a thieves’ argot.)
Figure 6 / Section 2.4 is relevant: https://revista.abralin.org/index.php/abralin/article/view/1728
