I tried Overleaf briefly when first converting my CV a couple years ago. Having a live preview helped so I didn't have to wait while recompiling.
Although things like [Skim][1] exist, Basictex does most of what I need, so I've never really tried wiring it into my existing install.
Pipe dream - If the people who work on macOS's Preview application were smart, they would steal it (or [Marked's][2]) ability to have a custom processor for displaying output. In that case, I could point it at my TeX install and just run my Makefile from there.
[1]: https://skim-app.sourceforge.io
[2]: http://marked2app.com/help/Custom_Processor.html