Creating Specimen vs Propagate

[HiOrcDen]

So I'm curious about propagation vs. allowing an Orchid to grow into a specimen.

Take for example the phaplaenopsis, not sure of the precise term (Moth Orchids?) but the popular one with big white flowers. If I simply want it to grow unhindered, do I repot into equally shallow but wider and wider pots? Or should the depth increase as well, and to what degree?

Will a specimen allowed to grow like this eventually reach a maximum size? I do not know if Phalaenopsis have some kind of bulb underneath the medium. I'm guessing stalks spread out and sprout up stems, something like that?

Anyway, I'm most curious about that last question... that is, will the 'Moth Orchid' Phalaenopsis specimen eventually reach a maximum size. And at that point will it continue to grow in any other sense?