Have you ever seen something so pot bound?

[NYCorchidman]

That sight is very typical of any oncidiums and coelogyne I've had.
Sometimes cattleyas and paphiopedilums as well.

Thing is, I hate repotting such root bound plants as I don't want to disrupt the tight root balls.

What I normally do is just leave them as is and just slide the whole thing into a larger pot and then add some new potting mix around the edge.
Have fun!