I started with a single stage, then moved to the Lee Classic Cast. Have seen the T-7 and it is indeed a well made beast. For me, the issue came down to convenience and cost. First, I do not load monster cartridges nor swage bullets or anything that requires a massive press. I also try not to abuse my equipment so a more modest press does the trick for me.
My reloading is mainly pistol cartridges and and small quantities of many different old milsurp rifle cartridges. For me, the advantage is that I can afford Lee Turret heads for each of the calibers that I reload for. That means I can leave my dies set in each one and do not have to spend time adjusting dies. I have dummy cartridges for each of my calibers and thus simply confirm settings after setting the turret with the preadjusted dies. For me, once I have found an accurate round for a particular rifle, then I don't want to monkey much with the bullet seating, sizing, etc.
For pistol bullets, my reloading is mainly as a backup so I can keep shooting when commercial ammo gets too high/and or unavailable. Given prices on 9mm for example, I save my brass and reload once or twice a year to keep my hand in. If I shot more, then I would probably buy a Dillon Square Deal for that caliber only. I also load .357 simply because I prefer my marginal .357 loads to the firebreathing stuff especially as I fire on an indoor range.
Thus, for me, the Lee Classic Turret is a tool to an end and given that it produces more than acceptable ammunition, is low priced, flexible, and gives me in one press the abilities of a single stage, some of the speed of a progressive, enough holes in the turret so that I can mount dies such as the FCD, a Powder Checking die, Sizing, etc., and cheap enough turret heads so that I do not have to constantly mess with dies, and strong enough to load .30 caliber and below rifle rounds and any handgun caliber that I choose to reload for, and is cheap enough so that I can replace it or add another if I so choose.