It makes totally sense to keep them rear facing for as long as possible (why on earth did I think 6 months....)
Heaps of people do now that the car seat laws say rearward to 6 months, most people don't get how big a child is to hit 9 or 12kg (depending on the capsule or seat). We have a 9kg capsule, DD1 outgrew it at 11 months, DD2 outgrew the length at 9 (she's off the growth chart). Same as when people tell me they aint wasting their money on a capsule to only use it 6 months