I just wanted to inform everybody about how I fixed Vegas Pro 18 constant crashing issue on my machine.

Vegas Pro has always been my favourite editor because of its simple and intuitive, while also powerful, interface.

I'm sure this has been mentioned elsewhere but I did not find this solution here. I am running Intel i9-9900k CPU with 8 cores paired with 32GB RAM and NVidia 2080ti.

Vegas Pro 18 was driving me insane as it was guaranteed to crash randomly around 1-3 times per hour. I never passed 30 minute mark without it crashing. This happened to me with VP17 as well.

When i finally entered Options --> Preferences --> Video and changed "Maximum number of rendering threats" from the default 32 to the number of cores I have = 8 the program has not crashed on me once... after several hours (days) of editing.
It also feels much snapier. For example. Used to take several seconds to perform undo. Now it happens in an instant.

I'm so glad to have solved this issue. Had already decided not to upgrade this program again. Had even switched to Magix other editor Video Pro X which is so fast and much more stable. Recommend that one as well. But I will be upgrading Vegas as well since this is fixed.