I definitely was stricter when calories were lower. But one of things I read in the archives here - and I'm confident I've read more of the archives than anyone which is why I've progressed more than 90% of guys who have ever joined here - is that the bigger guys got the more junk they were regularly eating to maintain it and keep getting bigger.
One of the key factors in how freely I can eat is my muscle mass - the bigger I've gotten the crazier my metabolism has become and that's still the case at 37 years old. Trust me - it still surprises me what I can get away with diet-wise and still wake up with ripped glutes at this size.
I don't recall exactly but I'd say it was probably around 6,000 calories that I knew I had to change things up - the volume of food per meal was getting to be too much, hampering digestion and leaving my constantly distended.
One of those ways I got from @Big A was adding shakes to meals. I'd do my whole food meal then wash it down with a shake of say 25g protein and 25g carbs.
But I do think there's a metabolic benefit - not a gains benefit, just a metabolic benefit - to eating whole food over drinking shakes. So I haven't added shakes to meals for the last two years, just found ways to get easier digesting foods in.
Since I know some will ask this, the only time I do shakes is intraworkout (50-75g carbs and 36-48g protein from Karbolyn and PeptoPro) and posworkout (75g protein and 75g carbs from ON hydro whey and Karbolyn) and usually at my last meal on training days since food is so high those days. The size of that shake varies based on the macros of the meal. I also add one scoop hydrolzyed whey in my morning oats to get protein in ASAP.