I love pull ups, all kinds of pull ups!
However, doing them on an extra thick bar is very humbling, especially if you are used to doing a lot of them.
It is well worth seeing your number of reps drop as you get stronger in a more challenging way (at least it is for me).
I like to pair thick bar pull ups with suspension training.
It’s a great combination since the suspension work is usually quite a bit higher in volume.