Depends what your definition of 'outgrow' is. I know breeders who keep their 6-8' boas in 4x2 cages. To me, that is unacceptable. But like i said, i try and give all my snakes cages they can stretch out in. My belief is if you cant afford them proper care, then you have too many snakes. Kind of the reason, i am kicking the idea of my next and probably last reptile. I am running out of space unless i take over the upstairs too lol. So i'm debating on a 50% SD ultra ivory retic, gila monster, Peruvian BCC, male Rio Bravo Pokigron Suriname, or female meltzer/Lincoln line Peruvian longtail BCL. Also been thinking of a male pied retic if i have to get Caesar a 8x3 cage since i can stack 3 of those like my 6x3 cages which would mean 1 for a pied retic and the last one would be for my Pokigron Suriname girl when she gets big.
Retics are a lot work. No way i could keep up with 4 of them as well as my other snakes. It would become just a job to me and it would lose the personal feel i have with all my snakes. I personally pride myself on having snakes that i would trust with pretty much anyone as i interact with them all the time. I mean Caesar is a handful but only because he loves to cruise around, not fast but just nonstop lol. The only time he sits still is on the bed sometimes when relaxing or the first time i gave him a bath. He sat there with his head on the tub edge while i wiped him down with a wet paper towel. He loves the attention which is kind of surprising to me. When i look in his cage, he will come out and sit at the front with his head on the litter dam looking at me. Not a food look either as i can open the cage and reach in and he just cruises over to the open door and hangs out by me lol.