Right and I think that an intermediate step benefits the plant because it causes root branching and gets new soil later and gets a little more air to the roots. It is not without drawbacks though
1. pots aren't free.
2. unused pots take up space
3. wait too long and you get circling
4. have to water more
5. it is harder to get feeding right in small pots
6. larger pots have larger thermal mass.
Anyway I mostly do it sequentially and may be nutty but I find it helps.