Not fully yet. Not all subreddits I browse have migrated or are planning to. I might slowly wean myself off it once the 3rd party apps stop working and I have enough of browsing old reddit on my phone.
I'm in the same boat. I limit myself to a superficial check of Reddit twice a day (morning and evening).
Some of the nitch subs haven't migrated and I get the feeling that the "world news" I get from Lemmy is either lagging or flat out missing content. Maybe, I haven't found an "unbiased" Lemmy world news group.