For years, catalog questions tend to be the most popular questions I get at my Lightroom seminars. One of those questions is whether or not to create multiple catalogs in Lightroom. See, back in Lightroom 1, it became fairly common knowledge that when your catalog grew to a certain size in photos (say 20,000) that it would slow down and you should create a new catalog so Lightroom would keep running quickly. But that’s not the case anymore. Lightroom doesn’t have a photo limit that anyone has hit. Adobe doesn’t even recommend creating multiple catalogs anymore. So the first…