When plants change environments they will need a period of time to acclimate to their new home. We recommend waiting at least a couple of weeks to repot your new plant. Plants can grow just fine in their plastic nursery pot and in most cases, will not be root bound. To avoid shocking your plant, give it time to adjust to your home as these conditions might vary greatly from where it was previously being grown.
The majority of orchids are epiphytes, meaning they use their roots to climb trees in nature. Orchid roots are drastically different from normal houseplant roots and should be given different potting mix. Orchids need very chuncky bark and should not be planted in regular potting soil.