Do most orchids shrivel/reduce with age ?

[betwixtimes]

I've noticed that things like my Dens and my intergenetic Oncidiums, that they all shrink/shrivel slightly. The new zygo I purchased, has started to bloom and the bulbs seem a bit wrinkled...Is this normal?

Like as the canes age with my Dens, they get a bit wrinkled, while the new canes stay nice and plump, until they spike and bloom. Then they tend to shrivel/harden slightly.

The Oncidiums, the bulbs get wrinkly as they get older---

Thing is I see peoples photos, or ever orchids for sale at decent nurseries---and no one seems to notice but me.

Am I over reacting?