If you want an easy setup for Postgresql you can try this: https://pigsty.io/

What works for me in such cases: Find a new really exciting project BUT have the discipline to only start working on it AFTER the current/old one is finished.

I am not really good at regex but what about: Keep your own syntax and offer some sort of "converter" - basically some function that takes a known syntax (POSIX oder .NET or whatever) and returns the "translated" regex which is in your syntax. This way people choose (perhaps based on knowledge or usecase) which syntax they want to use.

try "ipconfig /flushdns" after adding the secondary address

Do you know https://github.com/litehtml/litehtml ? this not a browser but just a parser for html and CSS... perhaps this can help...

Totally - since CSS engines are my bread and butter... not really, I just thought EPUB displays content using something that is capable of CSS...

CSS schould do the trick automatically, see https://medium.com/clear-left-thinking/all-you-need-to-know-about-hyphenation-in-css-2baee2d89179

Depends on context but esp. in complex scenarios I like the second form because it allows for having clearer understand of the flow while being composable: I could have a bigger methods which calculates certains states and then calls several MayBe-methods... It allows the MayBe-method to be called based on the state which in turn can be easily serialized and deserialized (which is not so easy with an "if"-Statement).