Like many here I have way too much equipment. I don't use anything other then large format any longer. My Bronica system sits gathering dust as does my medium format enlarger. My 35 mm hasn't seen daylight in years. I sold my 12X20 since it was not my thing.
My suggestion is choose one format and become absolutely familiar with it. When it no longer says what you want to say then get rid of it and use what will say what you want to say.
My experience with all of the excess camera stuff started out as a learning process, tranformed into an ego thing, and ultimately became a burden. Perhaps your experience will differ.