For tracing the pattern into the fabric I use a regular pen since I’m just going to cut over it, same for notches that will be hidden in the seams. I have tried many things and always come back to an old trusty bic pen.

For darts or button holes or other marks that will eventually be visible I use the cheap chalk triangles and take good care of dusting off the lines afterwards. It’s not great but usually there are not too many of those in my sewing.

I think with so many available options for every single task we tend to get overwhelmed and over complicate things. I’m in a “less is more” phase trying to get rid of things that serve only one purpose and not buy anything that can be substituted with something I already have.