Should I make ONE MASSIVE Lightroom Catalog or Many? Photography Question

Now that I have a new Apple MacBook Pro 15 in (2018) set up at the factory as my main computer. I need to set up a brand new Adobe Lightroom CC Catalog. The debate is do I set up one big one or a few smaller ones? I think I decided on setting up a few smaller ones for all my photos going back years. Maybe I will make a How To Set up an adobe Lightroom catalog in the future.