It really depends on the person, to be honest. Personally, my body laughs at any attempt I make to satiate it with a liquid “meal.” I need fiber and carbs and protein that I can eat, not drink. But other people find they get ill if they workout after having a meal.
I would tell you to just experiment. If what you’re doing is working for you, then why change it? If you aren’t having a crash in energy, you have a proper intake of nutrients and you’re happy with it, then do it!
If you find that you don’t like the way you feel during a workout, try eating solids beforehand or nothing at all (for non-cardio days. If you’re doing cardio, I highly recommend you have something in your system so you don’t get light-headed. I’ll play the bad example right now and tell you I had to sit in some strangers lawn and flail in their sprinkler after I failed to have lunch then went for my 7 mile run. Stupid Bonnie is stupid…)
If you are fine during your workout but afterwards you are famished and feel grouchy and weak… try having some solids that are high in fiber, carbs and protein.
It’s all about tweeking the theories to work for you. What makes one person may break another. Wash all the hype from your memory and start with a beautiful, glorious, blank page. That’s your blank page. You put on it what works and what doesn’t work for you. Refer to it often. Add to it and erase from it. So long as you aren’t hurting yourself with malnutrition, you should be fine.