I can answer this. Adding a queue thread to your executable is infinitely easier to redistribute and run than something that requires the user to install a pers

I can answer this. Adding a queue thread to your executable is infinitely easier to redistribute and run than something that requires the user to install a persistent postgres daemon. There are premade libraries for several languages that provide thread safe query queueing for sqlite transparently as drop in imports so you don't even really need to think about it. See e.g. https://github.com/dashawn888/sqlite3worker https://github.com/dashawn888/sqlite3worker (not mine)