I've not been able to stop using Reddit because quite simply, some subs never migrated and they are major subs for me, such as /r/hockey. I've been using it less for sure and I've used Lemmy more, especially with Sync now available, but only time will tell.
Same here, I love NBA so I frequent r/NBA because of the userbase.....I hope with the Sync for Lemmy app more people can migrate here but it's easier said than done 😔