My Oncidium "Sweet Sugar" has always either had blooms, and spikes following right after. It may be only a week before the new spike opens up after the old one died.
AND, it does this all year round. Even during our brutal summers, and in winter too.
The only time I didn't have a flower or spike on it was when I repotted it. So big deal, it took 3 weeks for new spikes to come out.
Also, I bought it 18 months ago in a 4" plastic pot. It's in a 8" clay pot now (recent repot) and has four spikes coming up.
Before last repot...
And when I tell ya that yellow pops, I really mean it.