Repotting cattleyas from moss into bark/When is the growth cycle deadline to repot?

[BrassavolaStars]

Hello all,

This post is related to a previous post I made about repotting.

I have about eight or so cattleyas (mostly acquired from eBay) potted in moss. I have always heard it is better to have cattleyas in bark and would have them in a bark mix without upending their growth as some are not in the best state right now and are recovering from various setbacks.

I know the best time to repot a cattleya is when the new roots are about to emerge or are just emerging.

My question is when in the growth cycle is it too late to repot? When the roots are 3 inches? When the new growth has completely matured? When the roots stop growing completely?

I have a few examples attached below of plants I am not sure about repoting

I ask this because I have a few cattleyas that are in old moss (some are pictured) that I should have repotted in the summer but did not because I was busy. They now have mostly mature new growths and roots that still have green tips, but are longer and the green tips are starting to turn whitish (an example attached below).

I assume I should just wait until another new growth appears.

I am just curious when the exact deadline is for repotting in terms of the growth cycle.
Thanks.