So was I until I actually went to have a look at one, adjusted the front seats as myself or my partner would sit and then checked what the rear was looking like - much more leg room than 535I, maybe a touch less head room height wise. We have front facing seat and he cannot reach the front passenger seat with his legs anymore. I reckon 5 series seats are much bulkier than 6 series (coupe pedigree), hence more room. Boot is big enough to easily swallow Mountain Buggy Terrain with larger wheels attaches, leaving enough room for more stuff. The opening itself is not very wide but the boot is spacious.
Managed to score a NZ new specimen with comfort seats, 4-zone climate, adaptive drive, full adaptive led headlights, head-up display, lane departure and blind spots, 360 cameras etc.
As per usual, done a few coding changes, updated maps to 2018 version, installed Pivot Throttle controller. Thinking of activating Speed limit info (reads and displays road signs).
Audis are all good, just not my thing... Realised that when I jumped back into the bimmer.