Sounds like Barry (Xunil).
Guilty, as charged.
I got fed up ages ago of trying to whittle my gear down to a pocket sized rucksack - I have everything stacked against me. I'm 6' 4" and around 230 pounds, so any kit and clothing is correspondingly large and even when packed down tends to be much larger than most folks' gear.
My long back army bergen harks back many years to my mountain rescue days and I see no reason to change it. All I did was make a couple of bubble wrap 'pods' to take some of the extra space towards the outermost rear of the pack, which forces the rest of your load to stay snug to your back for better load carrying.
I change the bubble wrap pod size depending on how much kit I want to hump around, and remove it completely for winter when I take a lot of bulky cold weather gear.
Unless I'm out on my own for the day or perhaps for a single solo night with ground kit I won't entertain a small pack. If I have my daughter or better half with me I usually go for around 45 - 50 litres, so that spare clothes, coats, water for the pooch and drinks and snacks for us can easily by carried with room to spare for any nicknacks we might pick up along the way.
The long back bergen is a great fit and allows a lot of flexibility.
It follows my normal principle of 'over-gun and under-use', where I would far rather have more than I need and not need to use it (but reserve the right to if circumstances dictate). That's an oddity and contradiction when compared to my own take on bushcraft, which is extremely minimalist.
The big pack comes in very handy with young kids or when assisting others. Last year when Charlotte was only three she was tired and grumbly and I made a nest for her in the main pack compartment, shoved some gear into the empty side pouches and left the lid open with the top pulled down slightly. She thought it was a scream and ended up falling asleep curled up in it
On other occasions I've chucked other folks' daysacks into the main compartment of my bergen when helping them down off the tops. Or a fresh road kill Roe deer, or...
Makes carrying the additional load a breeze.
The only tricky part is rigging something suitable to secure your gear without it rattling around. I modded my pack with a couple of compressions straps and some additional inner straps to keep my gear stable, and the bubble wrap pod does the rest.
It's not a perfect solution but I've made it work very well for me and there is little to no faff involved, which has to be a good thing.