I went from ITB > 100% hardware > Hybrid.
I found ITB productive but I felt like I was missing some tools from some hardware gear, mainly tactile things such as knobs/faders for filters and volume control. Another problem was the CPU issues for me, going fully ITB can be a chore if your computer is average so I would end up wasting some creative time by having to Bouce tracks just to save CPU load.
100% Hardware was something I got into because I got bored of my workflow, went on youtube and discovered things such as Op-1, Elektron, MPC …etc (bunch of cool gear). This gave me the fuzzy feelings and I made up my mind to try doing the 100% hardware. In my opinion while it is fun and it felt nice to have all instruments right in front of me, I realized that I had more fun completing tracks.
Now I have a hybrid setup and I feel its the best for me. It gives me the best of both worlds to the point where using a VST in a DAW felt like another hardware instrument with the added benefit of being able to record loops or arrange full tracks in either session view or a traditional linear view.
Id say hardware is indeed fun but sometimes we want more than to just have fun. In my opinion being satisfied of your work is more fulfilling than a fun time.
You should keep all your hardware as well as your daw and try to work a setup that works best for you, switch it around too, it doesnt have to be the same setup forever. You dont have to put all your eggs in one basket.